1 Division of Cardiology, Department of Internal Medicine, Medical Research Institute, Pusan National University Hospital, Busan, Korea.
2 Department of Thoracic and Cardiovascular Surgery, Medical Research Institute, Pusan National University Hospital, Busan, Korea.
3 Division of Nephrology, Department of Internal Medicine, Medical Research Institute, Pusan National University Hospital, Busan, Korea. island-real@hanmail.net.
4 Department of Rehabilitation Medicine, Medical Research Institute, Pusan National University Hospital, Busan, Korea.
5 Division of Endocrinology, Department of Internal Medicine, Medical Research Institute, Pusan National University Hospital, Busan, Korea.