1. Department of Hematology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Bunkyo-ku, Tokyo, Japan;
2. Department of Advanced Medicine for Infections and
3. Department of Management and Strategy, Clinical Research Center, National Center for Child Health and Development (NCCHD), Setagaya-ku, Tokyo, Japan;
4. Department of Hematology/Oncology, Osaka Women’s and Children’s Hospital, Osaka, Japan;
5. Department of Pediatrics, Nagoya University, Nagoya, Japan;
6. Department of Hematology and Rheumatology, Tohoku University, Sendai, Japan;
7. Department of Hematology, Osaka City University, Osaka, Japan;
8. Department of Hematology, Chiba University Hospital, Chiba, Japan;
9. Department of Hematology, Okayama Medical Center, Okayama, Japan;
10. Department of Hematology, Hokkaido University Hospital, Sapporo, Japan;
11. Department of Hematology, Saitama Medical Center, Jichi Medical University, Saitama, Japan;
12. Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan;
13. Department of Virology, Nagoya University Graduate School of Medicine, Nagoya, Japan;
14. Department of Allergy and Clinical Immunology, NCCHD, Setagaya-ku, Tokyo, Japan;
15. Department of Hematological Therapeutics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Bunkyo-ku, Tokyo, Japan; and
16. Division of Hematology and Oncology, Department of Internal Medicine, St. Marianna University School of Medicine, Kawasaki, Japan