Gachon University - Department of Internal Medicine, Sungkyunkwan University - Division of Hematology-Oncology, Dong-A University, School of Medicine, Dong-A University Hospital, Department of Internal Medicine, Dong-A University, School of Medicine, Dong-A University Hospital, Department of Internal Medicine, Dong-A University, School of Medicine, Dong-A University Hospital, Department of Internal Medicine, Dong-A University, School of Medicine, Dong-A University Hospital, Department of Internal Medicine, Dong-A University, School of Medicine, Dong-A University Hospital, Department of Dermatology, Dong-A University - Department of Pulmonology, Dong-A University, School of Medicine, Dong-A University Hospital, Department of Pathology, Gyeongsang National University, College of Medicine, Gyeongsang National University Hospital, Department of Internal Medicine, Gyeongsang National University, College of Medicine, Gyeongsang National University Hospital, Department of Internal Medicine, Sungkyunkwan University - Division of Hematology-Oncology, Sungkyunkwan University - Department of Medicine, Soonchunhyang University, School of Medicine, Bucheon Hospital, Department of Internal Medicine, Chung-Ang University, College of Medicine, Department of Medicine, Chung-Ang University, College of Medicine, Department of Internal Medicine, Gachon University - Department of Internal Medicine, Kosin University, College of Medicine, Department of Medicine, Division of Hematology-Oncology, Pusan National University, School of Medicine, Yangsan Hospital, Department of Internal Medicine, Pusan National University, School of Medicine, Yangsan Hospital, Department of Internal Medicine, Soonchunhyang University, School of Medicine, Soonchunhyang University Hospital, Department of Internal Medicine, Dankook University, College of Medicine, Department of Internal Medicine and Dankook University, College of Medicine, Department of Internal Medicine