Maho Inoue¹, Shigehisa Fumino¹, Mayumi Higashi¹, Taizo Furukawa¹, Tatsuro Tajiri¹, Toshihiko Imamura², Hajime Hosoi² (1.Department of Pediatric surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan, 2.Department of Pediatrics, Kyoto Prefectural University of Medicine, Kyoto, Japan)

Naonori Kawakubo¹, Tomoro Hishiki¹, Nami Shirakawa², Ayumu Arakawa², Chitose Ogawa² (1.Department of Pediatric Surgical Oncology, National Cancer Center Hospital, Tokyo, Japan, 2.Department of Pediatric Oncology, National Cancer Center Hospital, Tokyo, Japan)

Hideaki Tanaka¹, Yudai Goto¹, Hirofumi Shimizu¹, Michitoshi Yamashita¹, Hideki Sano², Atsushi Kikuta² (1.Department of Pediatric Surgery, Fukushima Medical University Hospital, Fukushima, Japan, 2.Department of Pediatric Oncology, Fukushima Medical University Hospital, Fukushima, Japan)

Hirofumi Shimizu¹, Yudai Goto¹, Hideki Sano², Atsushi Kikuta², Hideaki Tanaka¹ (1.Department of Pediatric surgery, Fukushima Medical University, Fukushima, Japan, 2.Department of Pediatric Oncology, Fukushima Medical University, Fukushima, Japan)

Fumio Asano, Norihiko Kitagawa, Shunsuke Fujii, Takafumi Kondo, Etsuko Osawa, Hidehito Usui, Kyoko Mochizuki, Masato Shinkai (Kanagawa Children’s Medical Center)

Kan Suzuki¹, Jun Fujishiro¹, Miho Watanabe¹, Chizue Uotani¹, Shohei Takami¹, Tsubasa Goshima¹, Mitsuteru Hiwatari², Junko Takita² (1.Department of Pediatric Surgery, University of Tokyo Hospital, 2.Department of Pediatrics, University of Tokyo Hospital)