Table 1. Steps in performing a meta-analysis for genetic association studies.

1.	Check study quality: Hardy-Weinberg test
2.	Check inter-study heterogeneity: Cochran Q test, I2
3.	Meta-analysis: Fixed or random effects model, Forrest plot
4.	Perform subgroup analysis: Ethnicity-specific analysis
5.	Check publication bias: Funnel plot, Egger's regression test
6.	Present meta-analysis result