1. Division of Hematology-Oncology, Department of Internal Medicine, Jeju National University Hospital, Jeju National University School of Medicine, Jeju, Korea
2. Department of Laboratory Medicine, Jeju National University Hospital, Jeju National University School of Medicine, Jeju, Korea
3. Division of Nephrology, Department of Internal Medicine, Dankook University Hospital, Dankook University College of Medicine, Cheonan, Korea