1. Department of Internal Medicine, Pusan National University School of Medicine, and Biomedical Research Institute, Pusan National University Yangsan Hospital, Yangsan, Gyeongsangnam-do, Korea
2. Department of Internal Medicine, Kosin University College of Medicine, Busan, Korea
3. Department of Internal Medicine, Pusan National University School of Medicine, and Biomedical Research Institute, Pusan National University Hospital, Busan, Korea
4. Department of Internal Medicine, Inje University College of Medicine, Haeundae Paik Hospital, Busan, Korea
5. Department of Internal Medicine, Inje University College of Medicine, Busan Paik Hospital, Busan, Korea
6. Department of Internal Medicine, Dong-A University Hospital, Busan, Korea