(a) Have the authors employed an accepted, valid definition of the phenotype adequate enough to reproduce the study? |
(b) Have the authors measured the phenotype appropriately? |
(c) Were suitable controls (matched at least for age, sex, race) used for comparison of allele frequency? |
(d) What was the probability of replication, given the sample size of the replication study and the strength of association in the original study? |
(e) Were markers of comparable location and informativeness used in this study? |
(f) Was there consideration of possible genetic heterogeneity based on symptoms or race? |