PPARGC1B and melanoma: A nevus GWAS meta-analysis shows that variants in MTAP, PLA2G6, IRF4, KITLG and the 9q32 region affect nevus count (38); combining this with a meta-analysis (41) of melanoma GWAS studies showed that GPRC5A, CYP1B1, PPARGC1B, HDAC4, FAM208B, DOCK8, and SYNE2 were associated with nevus count as well as melanoma risk.