1. Department of Internal Medicine, Dong-A University Hospital, Busan 49201, Republic of Korea
2. Department of Internal Medicine, Pusan National University Yangsan Hospital, Yangsan 50612, Republic of Korea
3. Department of Internal Medicine, Pusan National University School of Medicine, Busan 49241, Republic of Korea
4. Department of Internal Medicine, Pusan National University Hospital, Busan 49241, Republic of Korea
5. Biomedical Research Institute, Pusan National University Hospital, Busan 49241, Republic of Korea