In an unprecedented collaboration, the latter three studies joined forces to combine the findings of both their primary scans and follow-up endeavours (leading to a total of 32 554 samples), identifying CDKAL1, CDKN2A/B, IGF2BP2 and FTO as novel T2D susceptibility loci and confirming the SLC30A8 and HHEX/IDE associations. Here, FTO is linked to type 2 diabetes mellitus.