1. Department of Hematology and Oncology Miyagi Children's Hospital Sendai MiyagiJapan
2. Department of Pediatrics Tohoku University Graduate School of Medicine Sendai MiyagiJapan
3. Department of Clinical Pathology Miyagi Children's Hospital Sendai MiyagiJapan
4. Department of Orthopaedic Surgery Tohoku University Graduate School of Medicine Sendai Miyagi Japan