RPTOR and breast cancer: Previously identified CpGs in RPTOR (cg06418238), MGRN1 (cg00736299) and RAPSN (cg27466532) were not associated with breast cancer risk (cg06418238, P = 0.237, I2 = 0%; cg00736299, P = 0.779, I2 = 58%; cg27466532, P = 0.636, I2 = 0%).