Origin of the samples used either in the GWAS mining, or genotyped in the replication samples.

The number of cases and controls, number of markers mined/genotyped and the genotyping technology is shown. The covariate code takes into consideration the possible effect of country of origin and platform used in the genotypic analysis.
*Same control samples used,
**same control samples used. n.a., not applicable as the sample was not used for the merged analyses.