1. Department of Internal Medicine, National Cancer Center, Goyang, Korea
2. Department of Internal Medicine, Seoul National University Boramae Medical Center, Seoul, Korea
3. Department of Internal Medicine, Chonnam National University Hwasun Hospital, Hwasun, Korea
4. Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
5. Department of Radiology, Gangneung Asan Hospital, Gangneung, Korea
6. Department of Internal Medicine, Hanyang University Seoul Hospital, Seoul, Korea
7. Department of Internal Medicine, Seoul St. Mary’s Hospital, Seoul, Korea
8. Department of Internal Medicine, Nowon Eulji Medical Center, Seoul, Korea
9. Department of Internal Medicine, Chung-Ang University Hospital, Seoul, Korea
10. Department of Pathology, Seoul St. Mary’s Hospital, Seoul, Korea
11. Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea