1. Department of Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.
2. Department of Internal Medicine, Seoul Red Cross Hospital, Seoul, Korea.
3. Public Health Medical Service, Seoul National University Hospital, Seoul, Korea.
4. Department of Family Medicine, Korea University Guro Hospital, Seoul, Korea.
5. Korea National Institute for Bioethics Policy, Seoul, Korea.
6. Education Center for Public Health & Medicine, National Medical Center of Korea, Seoul, Korea.
7. Department of Family Medicine, Incheon St. Mary's Hospital, Incheon, Korea.
8. Department of Internal Medicine, Chungnam National University Hospital, Chungnam National University College of Medicine, Daejeon, Korea.
9. Hospice and Palliative Care Branch, National Cancer Control Institute, National Cancer Center, Goyang, Korea.
10. Department of Family Medicine, Gachon University Gil Medical Center, Incheon, Korea.
11. Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea.
12. Department of Family Medicine, International St. Mary's Hospital, Catholic Kwandong University College of Medicine, Incheon, Korea.
13. Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
14. Bobath Memorial Hospital, Seongnam, Korea.
15. Division of Oncology, Department of Internal Medicine, Catholic University St. Vincent's Hospital, Seoul, Korea.
16. Department of Hematology-Oncology, Ajou University Hospital, Suwon, Korea.
17. Department of Medical Education, Ewha Womans University College of Medicine, Seoul, Korea.
18. Department of Medical Humanities, Dong-A University College of Medicine, Busan, Korea.
19. Department of the History of Medicine and Medical Humanities, Seoul National University College of Medicine, Seoul, Korea.
20. Department of Medical Humanities and Ethics, Hanyang University College of Medicine, Seoul, Korea.
21. Department of Family Medicine, Dankook University College of Medicine, Cheonan, Korea.
22. Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.