[1
]Division of Cardiology, Department of Medicine, Samsung Medical Center, Sungkyunkwan
University School of Medicine, Seoul, Korea
[2
]Department of Cardiology, Samsung Changwon Hospital, Sungkyunkwan University School
of Medicine, Changwon, Korea
[3
]Division of Cardiology, Dongsuwon General Hospital, Suwon, Korea
[4
]Chungnam National University Hospital, Daejeon, Korea
[5
]Division of Cardiology, Kangwon National University Hospital, Chuncheon, Korea
[6
]Department of Cardiovascular Medicine, Regional Cardiocerebrovascular Center, Wonkwang
University Hospital, Iksan, Korea
[7
]Division of Cardiology, Department of Internal Medicine, Myongji Hospital, Goyang,
Korea
[8
]Division of Cardiology, Department of Medicine, Kangbuk Samsung Hospital, Sungkyunkwan
University School of Medicine, Seoul, Korea
[9
]Department of Internal Medicine, Chosun University Hospital, Gwangju, Korea
[10
]Department of Internal Medicine, College of Medicine, Chungbuk National University
Hospital, Cheongju, Korea
[11
]Eulji General Hospital, Seoul, Korea
[12
]Chung-Ang University Hospital, Seoul, Korea
[13
]Keimyung University Dongsan Medical Center, Daegu, Korea
[14
]Kwangju Christian Hospital, Gwangju, Korea
[15
]St Carollo Hospital, Suncheon, Korea
[16
]Konkuk University Chungju Hospital, Chungju, Korea
[17
]Korea University Guro Hospital, Seoul, Korea