1. Department of Nuclear Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Korea.
2. Department of Radiology, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Suwon 16247, Korea.
3. Department of Radiology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea.
4. Department of Nuclear Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul 03080, Korea.
5. Department of Nuclear Medicine, Kyungpook National University Medical Center, Kyungpook National University School of Medicine, Daegu 41566, Korea.
6. Department of Medicine, Division of Hematology-Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Korea.