Affiliation: | a Division of Pathology, Kanagawa Children's Medical Center, Yokohama, 232-8555 Japan b Division of Hemato-oncology, Kanagawa Children's Medical Center, Yokohama, 232-8555 Japan c Division of Surgery, Kanagawa Children's Medical Center, Yokohama, 232-8555 Japan d Division of Radiology, Kanagawa Children's Medical Center, Yokohama, 232-8555 Japan |