1. Pusan National University Hospital, Busan, Korea, Republic of
2. Seoul, Korea, Republic of
3. Busan, Korea, Republic of
4. Seoul, South Korea, Korea, Republic of
5. Chungbuk National University Hospital, Cheongju-si, Korea, Republic of
6. Ulsan, Korea, Republic of
7. Inha University College of Medicine, Department of Internal Medicine, Incheon, Korea, Republic of