PRRX1 and atrial fibrillation: The interactions between psychological stress and risk allele carrier status for each of the three SNPs associated with stress were non-significant in combined analyses on incident AF (rs1152591 ([SYNE2]), and in stratified analyses for men (rs3807989 [CAV1]) and women, (rs3903239 [PRRX1], rs1152591 [SYNE2]), respectively (data not shown).