Position of single nucleotide polymorphisms identified in (A) DNMT1, (B) DNMT3a, (C) DNMT3b, (D) Ago2, (E) HDAC5, and (F) CAPN1. DNMT, DNA (cytosine-5-)-methyltransferase; Ago, argonaute RISC catalytic component; HDAC5, histone deacetylase 5; CAPN1, calpain 1, (mu/I) large subunit.