Department of Hematology and Oncology Nagano Children’s Hospital Azumino Japan
S.S.: contributed to the conception and design of the study. E.U.: contributed to acquisition and analysis of the data. T.W., T.K., and K.S.: contributed to interpretation of the data. Supported in part by the Japan Society for the Promotion of Science (JSPS KAKENHI grant number 17K10105 provided to K.S.). The authors declare no conflict of interest.