1. Department of Hematology and Infectious Disease, Gifu University Hospital, Gifu, Japan
2. Department of Hematology, Gifu Municipal Hospital, Gifu, Japan
3. Department of Hematology, Gifu-Seino Medical Center, Gihoku Kosei Hospital, Gifu, Japan
4. Department of Hematology, Matsunami General Hospital, Gifu, Japan