1. Department of Pediatric Surgery, Research Field in Medical and Health Sciences, Medical and Dental Area, Research and Education Assembly, Kagoshima University, Kagoshima City, Japan.
2. Department of Surgery I, University of the Ryukyus, Nakagami-gun, Japan.
3. Department of Pediatric Surgery, Miyazaki Prefectural Miyazaki Hospital, Miyazaki, Japan.
4. Department of Pediatric Surgery, Fukuoka Children's Hospital, Fukuoka, Japan.
5. Department of Pediatric Surgery, University of Miyazaki Hospital, Miyazaki-gun, Japan.
6. Department of Pediatric Surgery, Kitakyushu City Yahata Hospital, Kitakyushu, Japan.
7. Department of Pediatric Surgery, Ehime University Hospital, Toon, Japan.
8. Department of Pediatric Surgery, Faculty of Medical Sciences, Kyushu University, Fukuoka, Japan.
9. Department of Pediatric Surgery, Fukuoka University, Fukuoka, Japan.
10. Department of Pediatric Surgery, National Hospital Organization Kokura Medical Center, Kitakyushu, Japan.
11. Department of Pediatric Surgery, St Luke's International Hospital, Tokyo, Japan.
12. Department of Pediatric Surgery, Kurume University School of Medicine, Kurume, Japan.
13. Division of Hepato-Biliary-Pancreas Surgery, Department of Surgery, Faculty of Medicine, University of Miyazaki, Miyazaki-gun, Japan.