Yonsei University - Gangnam Severance Hospital, Chung-Ang University, Gyeongsang National University, Gyeongsang National University - Gyeongsang National University Hospital, Gyeongsang National University, Gyeongsang National University - Gyeongsang National University Hospital, Gyeongsang National University - Gyeongsang National University Hospital, Chung-Ang University, Gyeongsang National University, Gyeongsang National University - Division of Cardiology and Chung-Ang University Gwang-myeong Hospital