1. Department of Orthopedic Surgery, National Health Insurance Service Ilsan Hospital , Goyang-si , South Korea
2. Division of Cardiology, Department of Internal Medicine, National Health Insurance Service Ilsan Hospital , 100, Ilsan-ro, Ilsandong-gu, Goyang-si 10444 , South Korea
3. Department of Cardiovascular Surgery, National Health Insurance Service Ilsan Hospital , Goyang-si , South Korea