[1] Chosun Univ, Dept Internal Med, Coll Med, Gwangju, South Korea
[2] Chonnam Natl Univ Hosp, Dept Cardiol, 42 Jebong Ro, Gwangju 61469, South Korea
[3] Catholic Univ Korea, Dept Internal Med, Div Cardiol, Seoul St Marys Hosp, Seoul, South Korea
[4] Gyeongsang Natl Univ, Sch Med, Dept Internal Med, Chang Won, South Korea
[5] Gyeongsang Natl Univ, Cardiovasc Ctr, Changwon Hosp, Chang Won, South Korea
[6] Sungkyunkwan Univ, Samsung Med Ctr, Heart Vasc & Stroke Inst, Sch Med, Seoul, South Korea
[7] Seoul Natl Univ Hosp, Dept Internal Med, Div Cardiol, Seoul, South Korea
[8] Seoul Natl Univ Hosp, Cardiovasc Ctr, Seoul, South Korea
[9] Kyung Hee Univ, Kyung Hee Univ Hosp, Dept Internal Med, Div Cardiovasc, Seoul, South Korea
[10] Chungbuk Natl Univ, Coll Med, Dept Internal Med, Cheongju, South Korea
[11] Yonsei Univ, Cardiovasc Res Inst, Cardiol Div, Coll Med, Seoul, South Korea
[12] Kyung Hee Univ Hosp Gangdong, Cardiovasc Ctr, Seoul, South Korea
[13] Kyungpook Natl Univ Hosp, Dept Internal Med, 680 Gukchaebosang Ro, Daegu 41944, South Korea
[14] Kyungpook Natl Univ, Sch Med, 680 Gukchaebosang Ro, Daegu 41944, South Korea