1Department of Internal Medicine, Yonsei University College of Medicine, Severance Hospital, Seoul, Korea
2Chonnam National University Hwasun Hospital, Hwasun, Jeollanamdo, Korea
3Inje University College of Medicine, Busan Paik Hospital, Busan, Korea
4Daegu Catholic University Medical Center, Daegu, Korea
5Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea
6Kosin University Gospel Hospital, Busan, Korea
7Gachon University Gil Medical Center, Incheon, Korea
8Dong-A University College of Medicine, Busan, Korea
9Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
10Chonbuk National University Medical School, Jeonju, Korea