1. Department of Internal Medicine, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul, Korea.
2. Department of Pathology, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul, Korea.
3. Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
4. Division of Hematology-Oncology, Department of Internal Medicine, Chonbuk National University Medical School and Hospital, Jeonju, Korea.
5. Division of Hematology-Oncology, Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea.
6. Department of Internal Medicine, Gachon University Hospital, Gachon University of Medicine and Science School of Medicine, Incheon, Korea.
7. Division of Hematology-Oncology, Department of Internal Medicine, Dankook University Hospital, Cheonan, Korea.