To the Editor:
The authors regret that there were errors in affiliation. This notice corrects affiliation of authors as 1Department of Internal Medicine, Pusan National University Yangsan Hospital, Pusan National University School of Medicine, Yangsan, Korea; 2Department of Cardiovascular and Thoracic Surgery, Pusan National University Yangsan Hospital, Pusan National University School of Medicine, Yangsan, Korea.
Content of correction:
1Department of Internal Medicine, Pusan National University Yangsan Hospital, Pusan National University School of Medicine, Yangsan, Korea; 2Department of Cardiovascular and Thoracic Surgery, Pusan National University Yangsan Hospital, Pusan National University School of Medicine, Yangsan, Korea.