[1] Yonsei Univ, Wonju Severance Christian Hosp, Dept Internal Med, Div Cardiol,Wonju Coll Med, Wonju, South Korea
[2] Korea Univ, Coll Med, Cardiovasc Ctr, Dept Cardiol,Anam Hosp, Seoul, South Korea
[3] Univ Ulsan, Gangneung Asan Hosp, Dept Internal Med, Div Cardiol,Coll Med, Kangnung, South Korea
[4] Gachon Univ, Gil Med Ctr, Dept Cardiol, Coll Med, Incheon, South Korea
[5] Hallym Univ, Kangnam Sacred Heart Hosp, Dept Internal Med, Div Cardiol,Coll Med, Seoul, South Korea
[6] Ewha Womans Univ, Coll Med, Dept Internal Med, Div Cardiol,Mokdong Hosp, Seoul, South Korea
[7] Inje Univ, Coll Med, Dept Internal Med, Div Cardiol,Ilsan Paik Hosp, Goyang, South Korea
[8] CHA Univ, CHA Bundang Med Ctr, Dept Internal Med, Div Cardiol, Seongnam, South Korea
[9] Natl Hlth Insurance Serv, Dept Internal Med, Div Cardiol, Ilsan Hosp, Goyang, South Korea
[10] Kosin Univ, Coll Med, Dept Internal Med, Div Cardiol,Gospel Hosp, Busan, South Korea
[11] Chungbuk Natl Univ, Chungbuk Natl Univ Hosp, Dept Internal Med, Div Cardiol,Coll Med, Cheongju, South Korea
[12] Chung Ang Univ, Coll Med, Dept Internal Med, Div Cardiol,Gwangmyeong Hosp, Gwangmyeong, South Korea
[13] Kangwon Natl Univ, Kangwon Natl Univ Hosp, Dept Internal Med, Div Cardiol,Sch Med, Chunchon, South Korea
[14] Hanyang Univ, Myongji Hosp, Dept Internal Med, Div Cardiol,Med Ctr, Goyang, South Korea
[15] Yonsei Univ, Gangnam Severance Hosp, Heart Ctr, Div Cardiol,Coll Med, Seoul, South Korea
[16] Hallym Univ, Chuncheon Sacred Heart Hosp, Cardiovasc Ctr, Div Cardiol,Coll Med, Chunchon, South Korea