Displaying publications 461 - 480 of 1020 in total

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  1. Neoh YL, Neoh PF, Salleh A, Yusof ZB, Gurusamy B, Ahmad Tajudin LS
    Ann Acad Med Singap, 2018 06;47(6):226-229.
    PMID: 30019068
    Matched MeSH terms: Case-Control Studies
  2. Dareng EO, Coetzee SG, Tyrer JP, Peng PC, Rosenow W, Chen S, et al.
    Am J Hum Genet, 2024 Jun 06;111(6):1061-1083.
    PMID: 38723632 DOI: 10.1016/j.ajhg.2024.04.011
    To identify credible causal risk variants (CCVs) associated with different histotypes of epithelial ovarian cancer (EOC), we performed genome-wide association analysis for 470,825 genotyped and 10,163,797 imputed SNPs in 25,981 EOC cases and 105,724 controls of European origin. We identified five histotype-specific EOC risk regions (p value <5 × 10-8) and confirmed previously reported associations for 27 risk regions. Conditional analyses identified an additional 11 signals independent of the primary signal at six risk regions (p value <10-5). Fine mapping identified 4,008 CCVs in these regions, of which 1,452 CCVs were located in ovarian cancer-related chromatin marks with significant enrichment in active enhancers, active promoters, and active regions for CCVs from each EOC histotype. Transcriptome-wide association and colocalization analyses across histotypes using tissue-specific and cross-tissue datasets identified 86 candidate susceptibility genes in known EOC risk regions and 32 genes in 23 additional genomic regions that may represent novel EOC risk loci (false discovery rate <0.05). Finally, by integrating genome-wide HiChIP interactome analysis with transcriptome-wide association study (TWAS), variant effect predictor, transcription factor ChIP-seq, and motifbreakR data, we identified candidate gene-CCV interactions at each locus. This included risk loci where TWAS identified one or more candidate susceptibility genes (e.g., HOXD-AS2, HOXD8, and HOXD3 at 2q31) and other loci where no candidate gene was identified (e.g., MYC and PVT1 at 8q24) by TWAS. In summary, this study describes a functional framework and provides a greater understanding of the biological significance of risk alleles and candidate gene targets at EOC susceptibility loci identified by a genome-wide association study.
    Matched MeSH terms: Case-Control Studies
  3. Stepien M, Hughes DJ, Hybsier S, Bamia C, Tjønneland A, Overvad K, et al.
    Br J Cancer, 2017 Feb 28;116(5):688-696.
    PMID: 28152549 DOI: 10.1038/bjc.2017.1
    BACKGROUND: Copper and zinc are essential micronutrients and cofactors of many enzymatic reactions that may be involved in liver-cancer development. We aimed to assess pre-diagnostic circulating levels of copper, zinc and their ratio (Cu/Zn) in relation to hepatocellular carcinoma (HCC), intrahepatic bile duct (IHBD) and gall bladder and biliary tract (GBTC) cancers.

    METHODS: A nested case-control study was conducted within the European Prospective Investigation into Cancer and Nutrition cohort. Serum zinc and copper levels were measured in baseline blood samples by total reflection X-ray fluorescence in cancer cases (HCC n=106, IHDB n=34, GBTC n=96) and their matched controls (1:1). The Cu/Zn ratio, an indicator of the balance between the micronutrients, was computed. Multivariable adjusted odds ratios and 95% confidence intervals (OR; 95% CI) were used to estimate cancer risk.

    RESULTS: For HCC, the highest vs lowest tertile showed a strong inverse association for zinc (OR=0.36; 95% CI: 0.13-0.98, Ptrend=0.0123), but no association for copper (OR=1.06; 95% CI: 0.45-2.46, Ptrend=0.8878) in multivariable models. The calculated Cu/Zn ratio showed a positive association for HCC (OR=4.63; 95% CI: 1.41-15.27, Ptrend=0.0135). For IHBC and GBTC, no significant associations were observed.

    CONCLUSIONS: Zinc may have a role in preventing liver-cancer development, but this finding requires further investigation in other settings.

    Matched MeSH terms: Case-Control Studies
  4. Noor NM, Nik Hussain NH, Sulaiman Z, Abdul Razak A
    Asia Pac J Public Health, 2015 Nov;27(8 Suppl):9S-18S.
    PMID: 26069164 DOI: 10.1177/1010539515589811
    Maternal morbidity is a concept of increasing interest in maternal health. This review aims to assess the contributory factors for severe maternal morbidity over the past one decade worldwide. A comprehensive electronic search was conducted. The search was restricted to articles written in the English language published from 2004 to 2013. Qualitative studies were excluded. A total of 24 full articles were retrieved of which 9 cohort, 7 case-control, 3 cross-sectional studies, and 5 unmentioned designs were included. The contributory factors were divided into 3 components: (a) sociodemographic characteristics, (b) medical and gynecological history, and (c) past and present obstetric performance. This review informs emerging knowledge regarding contributory factors for severe maternal morbidity and has implications for education, clinical practice and intervention. It enables a better understanding of the problem and serves as a foundation for the development of an effective preventive strategy for maternal morbidity and mortality.
    Matched MeSH terms: Case-Control Studies
  5. Selasawati HG, Naing L, Wan Aasim WA, Winn T, Rusli BN
    Asia Pac J Public Health, 2007;19(2):29-36.
    PMID: 18050561 DOI: 10.1177/10105395070190020601
    This study was carried out to determine the associated factors and the reasons for inappropriate utilisation of Emergency Department (ED) services at Universiti Sains Malaysia Hospital. A case-control study was conducted with 170 cases from ED and 170 controls from the Outpatient Department (OPD). A self-administered questionnaire was designed and used to obtain sociodemographic data, knowledge on the functions of ED and OPD, health seeking attitude and behaviour, and reasons for seeking treatment at ED. The study found that gender, marital status, family size, shift work, perceived illness, and knowledge on the role and functions of ED and OPD were significant associated factors. The three most common reasons for inappropriate utilisation of ED were as follows: "due to severity of illness" (85%), "can't go to OPD during office hours" (42%), and "ED near my house" (27%).

    Study site: Emergency department, Hospital Universiti Sains Malaysia (HUSM)
    Matched MeSH terms: Case-Control Studies
  6. Noran NH, Salleh N, Zahari M
    Asia Pac J Public Health, 2007;19(2):23-8.
    PMID: 18050560
    The objective of this study is to evaluate the relationship between reproductive exposures and age-related cataract among women. This was a hospital based case-control study. The study population included female patients, aged 50 years and above who attended the Eye clinic at the University of Malaya Medical Centre. The outcome measurement was based on ophthalmologic examination by an ophthalmologist. The data on exposure was obtained from face to face interview using a structured questionnaire. In order to reduce the recall bias, patients' medical records were used to substantiate the exposure status. Multiple logistic regression was used to assess the association of age-related cataract with exogenous estrogen usage (HRT and OCP) and duration of menses. Important confounders such as age, history of diabetes, cigarette smoking and steroids usage were controlled for in the analysis. Females with 29 years or less of endogenous estrogen exposure of, have almost three times the risk of developing age related cataract (adjusted OR 3.42: 95% CI: 1.28, 9.16), similarly among those with exposure of 30-32 years (adjusted OR 3.64: 95% CI: 1.08, 12.26). Hormone Replacement Therapy used for more than three years was found to be a protective factor of age-related cataract. There is evidence that reproductive exposure may play a role in reducing the occurrence of age-related cataract among Malaysian women.
    Study site: Eye clinic, University Malaya Medical Centre (UMMC), Kuala Lumpur, Malaysia
    Matched MeSH terms: Case-Control Studies
  7. Rahman LA, Hairi NN, Salleh N
    Asia Pac J Public Health, 2008;20(2):152-8.
    PMID: 19124309 DOI: 10.1177/1010539507311553
    The purpose of this study was to investigate the association between pregnancy-induced hypertension and low birth weight. A population-based case control study was conducted. Antenatal mothers who attended the government health centers in the district of Kuala Muda, Kedah, Malaysia from June 2003 to May 2004 were recruited. Cases were 312 mothers who delivered low birth weight babies, and controls were 312 mothers who delivered normal birth weight babies. Face-to-face interviews using a structured questionnaire and a review of medical records were carried out. After controlling for important confounders such as gestational age at delivery, maternal age, ethnicity, education, parity, and previous history of abortion, pregnancy-induced hypertension was found to be an independent risk factor (adjusted odds ratio = 5.06; 95% confidence interval: 2.63, 9.71) for low birth weight. There was a significant association of pregnancy-induced hypertension with low birth weight. Women who delivered low birth weight babies were 5 times more likely to have had pregnancy-induced hypertension.
    Matched MeSH terms: Case-Control Studies
  8. Arshad A, Rashid R
    Malays J Med Sci, 2008 Apr;15(2):24-8.
    PMID: 22589621
    A high frequency of bronchopulmonary infections complicating rheumatoid arthritis has been described in reports of case series. This study was undertaken to confirm and compare these finding in patients with RA and control. 117 patients with RA and 103 patients with OA/soft tissue rheumatism as controls. Study subjects were studied using their medical records available from hospitals' casenotes and GP data base. Details of all documented bronchopulmonary infections for the preceding year including lower and upper respiratory tract infections were recorded. Details of hospital admissions due to bronchopulmonary infection, antibiotic usage and functional capacity were also recorded. Mean age for RA was 56 and 59 for control. There were 34 males and 83 females in RA group, however, 14 males and 55 females in control group. There were at least 1 episodes of BPI in 66.7% (p<0.05) patients with RA and 48.5% in control. 69.2% (p<0.05) of subgroup patients with RA were noted to have poorer functional capacity compared to 50% in control. More RA patients with BPI (15%) (p<0.05) were admitted to hospital compared to control (3.8%). Significance findings were noted in terms of prevalence of BPI in RA patients compared to controls as well as patients with RA have severe course of BPI warranting hospitalization. RA patients with poorer functional capacity also noted to have high incidence of BPI.
    Study site: Rheumatology clinic, Hospital Alor Setar, Kedah, Malaysia
    Matched MeSH terms: Case-Control Studies
  9. Shaharir SS, Nawi AM, Mariamutu TN, Kamaruzaman L, Said MSM, Rajalingham S, et al.
    Int J Rheum Dis, 2025 Jan;28(1):e70043.
    PMID: 39791506 DOI: 10.1111/1756-185X.70043
    OBJECTIVES: To determine the prevalence of self-reported delayed adverse events (DAEs), major AEs, and flares following COVID-19 vaccinations among patients with autoimmune rheumatic diseases (AIRDs) in Malaysia.

    METHODOLOGY: An electronically validated survey from the COVID-19 vaccination in autoimmune diseases (COVAD) study group was distributed in July 2021 to patients with autoimmune diseases and healthy controls (HCs). The survey collected data on DAEs (any AE that persisted or occurred after 7 days of vaccination), any early or delayed major adverse events (MAEs), and flares following COVID-19 vaccination. Generalized estimating equation (GEE) models were performed to determine the factors associated with repeated events of DAEs, MAEs, and flares.

    RESULTS: A total of 556 vaccines were administered to 204 subjects (150 AIRDs and 54 HCs), with 72.1% completing 3 doses. In multivariate GEE analysis, there was a greater frequency of minor DAEs among AIRDs versus HCs (OR 5.65, p = 0.052). The occurrence of MAEs was higher in AIRDs versus HCs (4.9% vs. 1.3%, p = 0.052), but it was no longer significant in the GEE model. In the AIRDs group, the BNT162b2 vaccine increased the risk for minor DAEs (OR4.68, p = 0.02) while patients with autoimmune multimorbidity showed a greater risk for MAEs (OR 8.25, p = 0.007). The rate of flare was 10.6% and multivariate GEE analysis revealed that The rate of flare was 10.6% and multivariate GEE analysis revealed that systemic lupus erythematosus (SLE) (OR0.31, p = 0.03) and hydroxychloroquine (HCQ) (OR 0.16, p 

    Matched MeSH terms: Case-Control Studies
  10. Idris IB, Ghazi HF, Zhie KH, Khairuman KA, Yahya SK, Abd Zaim FA, et al.
    Ann Glob Health, 2016 6 22;82(1):202-8.
    PMID: 27325078 DOI: 10.1016/j.aogh.2016.01.021
    The prevalence of asthma is increasing, especially among children in Malaysia, with environmental factors as one of the main preventable contributors. The aim of this study was to determine the association between environmental air pollutants and the occurrence of asthma among children seen in pediatric clinics in Universiti Kebangsaan Malaysia Medical Center (UKMMC), Kuala Lumpur. An unmatched case control study among children who attended the pediatric clinic was carried out from May to August 2015. A total of 223 children who were diagnosed with asthma (105 cases) and who did not have asthma (118 controls) were included in this study. Their parents or caregivers were interviewed using questionnaires modified from the International Study of Asthma and Allergies in Childhood. Data obtained were analyzed using SPSS software version 20. There was a higher risk of asthma in those who had carpet at home (OR = 2.15 CI [1.25-3.68]), those who lived within 200 m of heavy traffic (OR = 1.72 CI [1.01-2.93]), and those who were exposed to lorry fumes (OR = 2.61. CI [1.38-4.93]). Environmental air pollutants increased the risk of asthma among children in Malaysia. Exposure to congested roads, lorry fumes, and indoor carpet were associated with asthma among children in this study. Parents or caretakers of children with asthma should be given adequate education on the prevention of asthmatic attack among these children.
    Study site: Paediatric clinic, Pusat Perubatan Universiti Kebangsaan Malaysia (PPUKM), Kuala Lumpur, Malaysia
    Matched MeSH terms: Case-Control Studies
  11. Joyce-Tan SM, Zain SM, Abdul Sattar MZ, Abdullah NA
    J Diabetes Res, 2016;2016:2161376.
    PMID: 26682227 DOI: 10.1155/2016/2161376
    Genome-wide association studies (GWAS) have been successfully used to call for variants associated with diseases including type 2 diabetes mellitus (T2DM). However, some variants are not included in the GWAS to avoid penalty in multiple hypothetic testing. Thus, candidate gene approach is still useful even at GWAS era. This study attempted to assess whether genetic variations in the renin-angiotensin system (RAS) and their gene interactions are associated with T2DM risk. We genotyped 290 T2DM patients and 267 controls using three genes of the RAS, namely, angiotensin converting enzyme (ACE), angiotensinogen (AGT), and angiotensin II type 1 receptor (AGTR1). There were significant differences in allele frequencies between cases and controls for AGT variants (P = 0.05) but not for ACE and AGTR1. Haplotype TCG of the AGT was associated with increased risk of T2DM (OR 1.92, 95% CI 1.15-3.20, permuted P = 0.012); however, no evidence of significant gene-gene interactions was seen. Nonetheless, our analysis revealed that the associations of the AGT variants with T2DM were independently associated. Thus, this study suggests that genetic variants of the RAS can modestly influence the T2DM risk.
    Matched MeSH terms: Case-Control Studies
  12. Khor GH, Froemming GR, Zain RB, Abraham MT, Thong KL
    Asian Pac J Cancer Prev, 2014;15(20):8957-61.
    PMID: 25374236
    BACKGROUND: Promoter hypermethylation leads to altered gene functions and may result in malignant cellular transformation. Thus, identification of biomarkers for hypermethylated genes could be useful for diagnosis, prognosis, and therapeutic treatment of oral squamous cell carcinoma (OSCC).

    OBJECTIVES: To screen hypermethylated genes with a microarray approach and to validate selected hypermethylated genes with the methylation-specific polymerase chain reaction (MSPCR).

    MATERIALS AND METHODS: Genome-wide analysis of normal oral mucosa and OSCC tissues was conducted using the Illumina methylation microarray. The specified differential genes were selected and hypermethylation status was further verified with an independent cohort sample of OSCC samples. Candidate genes were screened using microarray assay and run by MSPCR analysis.

    RESULTS: TP73, PIK3R5, and CELSR3 demonstrated high percentages of differential hypermethylation status.

    CONCLUSIONS: Our microarray screening and MSPCR approaches revealed that the signature candidates of differentially hypermethylated genes may possibly become potential biomarkers which would be useful for diagnostic, prognostic and therapeutic targets of OSCC in the near future.

    Matched MeSH terms: Case-Control Studies
  13. Mohamad S, Isa NM, Muhammad R, Emran NA, Kitan NM, Kang P, et al.
    PLoS One, 2015;10(1):e0117104.
    PMID: 25629968 DOI: 10.1371/journal.pone.0117104
    CHEK2 is a protein kinase that is involved in cell-cycle checkpoint control after DNA damage. Germline mutations in CHEK2 gene have been associated with increase in breast cancer risk. The aim of this study is to identify the CHEK2 gene germline mutations among high-risk breast cancer patients and its contribution to the multiethnic population in Malaysia. We screened the entire coding region of CHEK2 gene on 59 high-risk breast cancer patients who tested negative for BRCA1/2 germline mutations from UKM Medical Centre (UKMMC), Hospital Kuala Lumpur (HKL) and Hospital Putrajaya (HPJ). Sequence variants identified were screened further in case-control cohorts consisting of 878 unselected invasive breast cancer patients (180 Malays, 526 Chinese and 172 Indian) and 270 healthy individuals (90 Malays, 90 Chinese and 90 Indian). By screening the entire coding region of the CHEK2 gene, two missense mutations, c.480A>G (p.I160M) and c.538C>T (p.R180C) were identified in two unrelated patients (3.4%). Further screening of these missense mutations on the case-control cohorts unveiled the variant p.I160M in 2/172 (1.1%) Indian cases and 1/90 (1.1%) Indian control, variant p.R180C in 2/526 (0.38%) Chinese cases and 0/90 Chinese control, and in 2/180 (1.1%) of Malay cases and 1/90 (1.1%) of Malay control. The results of this study suggest that CHEK2 mutations are rare among high-risk breast cancer patients and may play a minor contributing role in breast carcinogenesis among Malaysian population.
    Matched MeSH terms: Case-Control Studies
  14. Kashyap M, Mulsant BH, Tannenbaum C
    Am J Geriatr Psychiatry, 2015 Mar;23(3):326-9.
    PMID: 25450763 DOI: 10.1016/j.jagp.2014.09.009
    The discriminative ability of serum anticholinergic activity (SAA) to differentiate between older individuals with stable versus deteriorating cognition remains undetermined. We examined the relationship between SAA changes, the presence or absence of a mild neurocognitive disorder, age and anticholinergic medication over a one-year time period.
    Matched MeSH terms: Case-Control Studies
  15. Cao N, Zhao A, Zhao G, Wang X, Han B, Lin R, et al.
    Integr Cancer Ther, 2015 Mar;14(2):133-9.
    PMID: 25567328 DOI: 10.1177/1534735414564185
    BACKGROUND: In China, traditional Chinese herbal medicine (TCHM) has been widely used for pancreatic cancer. This retrospective, matched case-control study aimed to assess factors affecting the survival time of patients with pancreatic cancer.
    METHODS: From 2004 to 2012, a total of 411 patients with pathologically confirmed pancreatic cancer were enrolled, and 272 patients were matched and divided into TCHM and non-TCHM groups (control group) based on received TCHM or not. The match was according to gender, age of onset, radiotherapy, and chemotherapy. Both groups received comprehensive treatments, the TCHM group simultaneously received the TCHM spleen-invigorating compound for more than 3 months. The Cox model was used for prognostic factor analysis and the Kaplan-Meier method for estimating median overall survival (OS) and disease-free survival (DFS).
    RESULTS: In 130 patients with advanced pancreatic cancer, COX analysis showed the Karnofsky Performance Scale (KPS; P = .000), radiotherapy (P = .003), and TCHM (P = .001) were independent prognostic factors for OS, with median OS of 12.7 and 9.9 months in TCHM and non-TCHM groups, respectively (hazard ratio [HR] = 0.520; 95% confidence interval [CI] = 0.353-0.766; P = .033). In 142 patients undergoing radical surgery, KPS (P = .000) and TCHM (P = .000) were independent prognostic factors for OS and DFS, median OS was 23.8 and 12.4 months in TCHM and non-TCHM groups, respectively (HR = 0.373; 95% CI = 0.251-0.554; P = .000), and the median DFS was 21.5 and 10.2 months in TCHM and non-TCHM groups, respectively (HR = 0.352; 95% CI = 0.237-0.522; P = .000).
    CONCLUSIONS: KPS was an important prognostic factor of pancreatic cancer. Spleen-invigorating compounds could have an effect on improving the prognosis of pancreatic cancer patients.
    Matched MeSH terms: Case-Control Studies
  16. Chua KH, Lian LH, Khor WC, Lee WS, Hilmi I, Goh KL, et al.
    J Dig Dis, 2015 Apr;16(4):205-16.
    PMID: 25564941 DOI: 10.1111/1751-2980.12229
    The study aimed to investigate the association between the interferon regulatory factor 5 (IRF5) gene polymorphisms and the onset of Crohn's disease (CD) in a Malaysian cohort.
    Matched MeSH terms: Case-Control Studies
  17. Choong MY, Tee SF, Tang PY
    Psychiatry Res, 2014 Dec 30;220(3):1163-6.
    PMID: 25219619 DOI: 10.1016/j.psychres.2014.07.076
    Matched MeSH terms: Case-Control Studies
  18. Lau TP, Roslani AC, Lian LH, Lee PC, Hilmi I, Goh KL, et al.
    Genet. Mol. Res., 2014;13(3):5555-61.
    PMID: 25117311 DOI: 10.4238/2014.July.25.9
    Growth factors are polypeptides that are critical for the initiation, progression, and metastasis of cancer. Most tumor cells are capable of synthesizing particular growth factors leading to constitutive pathway activation in these cells through autocrine signaling. Epidermal growth factor (EGF) is a potent mitogenic peptide that exerts direct effects on the proliferation and differentiation of tumor cells in carcinogenesis. By contrast, vascular endothelial growth factor (VEGF) is vital for the invasion and metastasis of neoplasms through the formation of new blood vessels from mature endothelial cells. In this study, we investigated the association between functional polymorphisms of both the EGF and VEGF genes and colorectal cancer (CRC) susceptibility. A total of 130 CRC patients and 212 healthy controls were recruited for this case-control study. Genotyping of genetic variants was conducted via real-time polymerase chain reaction (PCR) amplification with allele-specific TaqMan probes. None of the genotypes of the EGF +61 A>G and VEGF +936 C>T variants was significantly associated with CRC susceptibility among the Malaysian subjects evaluated (P > 0.05). The observed frequency distributions of the EGF +61 A>G polymorphism genotypes showed ethnic heterogeneity, which was not the case for the VEGF +936 C>T genotypes. In conclusion, no positive correlation between these functional polymorphisms and CRC risk was found in this Malaysian population. Studies of the EGF and VEGF genes and CRC susceptibility are scarce, and the results reported thus far differ from one population to another. Hence, more replication studies are warranted before any firm conclusions can be made.
    Matched MeSH terms: Case-Control Studies
  19. Ramli R, Oxley J, Hillard P, Mohd Sadullah AF, McClure R
    BMC Emerg Med, 2014;14:17.
    PMID: 25086638 DOI: 10.1186/1471-227X-14-17
    The effectiveness of helmets in reducing the risk of severe head injury in motorcyclists who were involved in a crash is well established. There is limited evidence however, regarding the extent to which helmets protect riders from facial injuries. The objective of this study was to determine the effect of helmet type, components and fixation status on the risk of facial injuries among Malaysian motorcyclists.
    Matched MeSH terms: Case-Control Studies
  20. Wei LK, Menon S, Griffiths LR, Gan SH
    J Hum Hypertens, 2015 Feb;29(2):99-104.
    PMID: 25055800 DOI: 10.1038/jhh.2014.53
    Irregular atrial pressure, defective folate and cholesterol metabolism contribute to the pathogenesis of hypertension. However, little is known about the combined roles of the methylenetetrahydrofolate reductase (MTHFR), apolipoprotein-E (ApoE) and angiotensin-converting enzyme (ACE) genes, which are involved in metabolism and homeostasis. The objective of this study is to investigate the association of the MTHFR 677 C>T and 1298A>C, ACE insertion-deletion (I/D) and ApoE genetic polymorphisms with hypertension and to further explore the epistasis interactions that are involved in these mechanisms. A total of 594 subjects, including 348 normotensive and 246 hypertensive ischemic stroke subjects were recruited. The MTHFR 677 C>T and 1298A>C, ACE I/D and ApoEpolymorphisms were genotyped and the epistasis interaction were analyzed. The MTHFR 677 C>T and ApoE polymorphisms demonstrated significant associations with susceptibility to hypertension in multiple logistic regression models, multifactor dimensionality reduction and a classification and regression tree. In addition, the logistic regression model demonstrated that significant interactions between the ApoE E3E3, E2E4, E2E2 and MTHFR 677 C>T polymorphisms existed. In conclusion, the results of this epistasis study indicated significant association between the ApoE and MTHFR polymorphisms and hypertension.
    Matched MeSH terms: Case-Control Studies
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