1. Department of Internal Medicine; Tokyo Metropolitan Komagome Hospital; 3-18-22 Honkomagome, Bunkyo-ku Tokyo 113-8677 Japan
2. Aichi Prefectural Colony; Kasugai Japan
3. Division of Pediatric Surgery, Department of Surgery; Kansai Medical University; Osaka Japan
4. First Department of Surgery; University of Yamanashi; Kofu Japan
5. Division of Pediatric Surgery, Department of Surgery; Nihon University School of Medicine; Tokyo Japan
6. Department of Pediatric Surgery; Shizuoka Children's Hospital; Shizuoka Japan
7. Department of Gastroenterology and Hepatology; Tokyo Medical University; Tokyo Japan
8. Harue Hospital; Fukui Japan