Table S1.

Twenty-five participating institutions

Number	Site location
1	Ajou University Medical Center, Suwon, Korea
2	Busan Paik Hospital, Busan, Korea
3	Chonnam National University Hospital, Gwangju, Korea
4	Chungnam National University Hospital, Daejeon, Korea
5	Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea
6	Dankook University Hospital, Cheonan, Korea
7	Dong-A University Hospital, Busan, Korea
8	Gachon University Gil Hospital, Incheon, Korea
9	Inha University College of Medicine, Incheon, Korea
10	Kangdong Sacred Heart Hospital, Seoul, Korea
11	Keimyung University Dongsan Medical Center, Daegu, Korea
12	Korea University Anam Hospital, Seoul, Korea
13	Korea University Guro Hospital, Seoul, Korea
14	Pusan National University Hospital, Busan, Korea
15	Samsung Medical Center, Seoul, Korea
16	Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Korea
17	Seoul National University Bundang Hospital, Seongnam, Korea
18	Seoul National University Hospital, Seoul, Korea
19	Seoul St Mary’s Hospital, Seoul, Korea
20	Soonchunhyang University Hospital, Seoul, Korea
21	Ulsan University Hospital, Ulsan, Korea
22	Wonkwang University Hospital, Iksan, Korea
23	Yeungnam University Medical Center, Daegu, Korea
24	Yonsei University Gangnam Severance Hospital, Seoul, Korea
25	Yonsei University Severance Hospital, Seoul, Korea