1Department of Hematology, Juntendo University School of Medicine, Juntendo University, Tokyo, Japan
2Department of Hematology and Oncology, University of Yamanashi, Yamanashi, Japan
3Department of Gastroenterology and Hematology, University of Miyazaki, Miyazaki, Japan
4Department of Hematology, Kobe City Medical Center General Hospital, Kobe, Japan
5Blood Transfusion Service, Mie University, Tsu, Japan
6Department of Hematology, Tokyo Medical University, Tokyo, Japan
7Department of Hematology, Nephrology, and Rheumatology, Akita University Graduate School of Medicine, Akita, Japan
8Novartis Pharma KK, Tokyo, Japan
9Department of Medicine and Biosystemic Science, Kyushu University, Fukuoka, Japan