MAOA and oculopharyngeal muscular dystrophy: Subjects with the MAOA (rs1137070) risk T-allele were significantly associated with the risks of oral cavity and pharynx cancers (AOR = 2.37, 95% CI = 1.47–3.81) and OPMD (AOR = 3.25, 95% CI = 1.43–7.38).