1. Department of Internal Medicine, Inje University Busan Paik Hospital, Busan, Korea.
2. Department of Nephrology, Changwon Fatima Hospital, Changwon, Korea.
3. Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea.
4. Department of Internal Medicine, Pusan National University Hospital, Busan, Korea.
5. Department of Medicine, Kangwon National University Hospital, Kangwon National University School of Medicine, Chuncheon, Korea.
6. Department of Biomedical Informatics (SNUBI), Division of Biomedical Informatics, Seoul National University College of Medicine, Seoul, Korea.
7. Department of Internal Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea.