ANK1 and type 2 diabetes mellitus: Four T2D GWAS loci discovered in a Japanese population earlier have been shown to be significantly associated with T2D in the largest European GWAS meta-analysis10: KCNQ1 (refs 3, 4), UBE2E2 (ref. 5), C2CD4A–C2CD4B5 and ANK1 (ref. 6), highlighting that there are common loci conferring susceptibility to T2D among the different ethnic groups studied.