Figure 2

Clustering of reference and study samples. PC1 and PC2 reveal three main clusters: Tuscans from Italy (TSI), Finnish (FIN), and a Western European cluster with the CEU (Utah Residents with Northern and Western European ancestry), the GBR (British) and the GoNL samples (a). b shows that most of our GWAS samples clustered in a similar way to the corresponding 1000G/GoNL samples.