1. Division of Cardiology, Department of Internal Medicine, Keimyung University Dongsan Medical Center, Daegu, Republic of Korea.
2. Department of Cardiology, School of Medicine and Institute for Medical Science, Keimyung University, Daegu, Republic of Korea.
3. Department of Obstetrics and Gynecology, Keimyung University Dongsan Medical Center, Daegu, Republic of Korea.