https://orcid.org/0000-0001-5012-0906;2. Department of Pediatrics, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, JapanCorrespondence: Takuro Nishikawa, MD, Department of Pediatrics, Graduate School of Medical and Dental Sciences, Kagoshima University, 8‐35‐1 Sakuragaoka, Kagoshima City, Kagoshima 890‐8520, Japan. Email:;3. Department of Hematology, Nippon Medical School, Tokyo, Japan;4. Department of Clinical Pharmacotherapy, Hiroshima University, Hiroshima, Japan;5. Department of Clinical Pharmacy and Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan;6. Department of Pediatrics, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan;7. Department of Pediatrics, Kagoshima City Hospital, Kagoshima, Japan