1. Department of PathologyKeio University School of Medicine 35 Shinanomachi, Shinjuku‐ku Tokyo Japan
2. Divion of Diagnostic PathologyKeio University Hospital 35 Shinanomachi, Shinjuku‐ku Tokyo Japan
3. Department of Pediatric CardiologyTokyo Women's Medical University 8–1, Kawada‐cho, Shinjuku‐ku Tokyo Japan
4. Department of PediatricsKeio University School of Medicine 35 Shinanomachi, Shinjuku‐ku Tokyo Japan
5. Department of PathologySaitama Medical University 38 Morohongo, Moroyamacho, Iruma Saitama Japan