1. Department of Internal Medicine and Institute of Health Science, School of Medicine, Gyeongsang National University
2. Biomedical Research Institute, Gyeongsang National University Hospital
3. Department of Internal Medicine, Kosin University College of Medicine
4. Department of Internal Medicine, Haeundae Paik Hospital, Inje University College of Medicine
5. Department of Internal Medicine, Pusan National University School of Medicine
6. Department of Internal Medicine, Dong-A University College of Medicine