HLA-DQA1 and Cowden syndrome 1: Similarly, there were no considerable associations between either DRB1*08:03 (Supplemental Table S6), DQA1*01:03 (Supplemental Table S7), A*11:01 (Supplemental Table S8), or C*03:04 (Supplemental Table S9) alleles and any cardiac phenotypes in patients with CS.