AP3S2 and type 2 diabetes mellitus: AP3S2 has been linked to T2D in six different GWASs [14–19] investigating various populations (South Asian, Japanese and European ancestry) and with four different SNPs, three of which (rs12912009, rs2028299, rs8031576) are in LD (r2 ≥ 0.80) with rs4932265.