1. Department of Internal Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea.
2. Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
3. Department of Cancer Control and Population Health, Graduate School of Cancer Science and Policy, National Cancer Center, Goyang, Korea.
4. Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
5. Department of Internal Medicine, Inje University Ilsan Paik Hospital, Goyang, Korea.
6. Health Screening and Promotion Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
7. Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.
8. Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea.
9. Department of Internal Medicine, Chosun University School of Medicine, Gwangju, Korea.
10. Department of Internal Medicine, Gachon University, College of Medicine, Incheon, Korea.
11. Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea.
12. Department of Internal Medicine, Chonbuk National University Hospital, Chonbuk National University College of Medicine, Jeonju, Korea.
13. Department of Internal Medicine, Uijeongbu St. Mary's Hospital, The Catholic University of Korea, College of Medicine, Uijeongbu, Korea.
14. Department of Internal Medicine, St. Carollo General Hospital, Suncheon, Korea.
15. Department of Internal Medicine, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul, Korea.
16. Department of Internal Medicine, University of Ulsan College of Medicine, Ulsan, Korea.
17. Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea.
18. Department of Internal Medicine, Dongguk University Gyeongju Hospital, Dongguk University College of Medicine, Gyeongju, Korea.
19. Department of Internal Medicine, Jeju National University College of Medicine, Jeju, Korea.
20. Department of Internal Medicine, Dankook University Hospital, Cheonan, Korea.
21. Department of Internal Medicine, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea.
22. Department of Internal Medicine, Chungnam National University College of Medicine, Daejeon, Korea.
23. Department of Internal Medicine, Inje University Busan Paik Hospital, Inje University College of Medicine, Busan, Korea.
24. Department of Internal Medicine, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, Korea.
25. Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea.
26. Department of Internal Medicine, Chonnam National University Hwasun Hospital, Hwasun, Korea.
27. Department of Internal Medicine, Wonkwang University College of Medicine, Iksan, Korea.
28. Department of Internal Medicine, Gyeongsang National University Hospital, Gyeongsang National University College of Medicine, Jinju, Korea.
29. Department of Internal Medicine, GangNeung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Korea.
30. Department of Internal Medicine, Chungbuk National University College of Medicine, Cheongju, Korea.
31. Department of Internal Medicine, Kangwon National University School of Medicine, Chuncheon, Korea.
32. Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea.
33. Department of Internal Medicine, Kyungpook National University College of Medicine, Daegu, Korea.
34. Department of Internal Medicine, Pusan National University School of Medicine, Busan, Korea.