OR2F2 and depressive symptom measurement: Six other SNP variants were suggestively associated with depression in the EM group, including the intronic regions of CHD2L, GMO5: rs2297754, intronic region of BUB3: rs75155690, intronic region of PDZRN4: rs79135118, 3’UTR region of ATOH8: rs1055770, the intergenic region between MIR197 and FAM241A: rs5897874, and the intergenic region between OR2F2 and OR2F1: rs41376753.