1. Division of the Gastrointestinal, Endocrine and Pediatric Surgery, Department of Surgery, Faculty of Medicine University of Miyazaki Miyazaki Japan
2. Division of the Thoracic and Breast Surgery, Department of Surgery, Faculty of Medicine University of Miyazaki Miyazaki Japan
3. Division of the Hepato‐Biliary‐Pancreas Surgery, Department of Surgery, Faculty of Medicine University of Miyazaki Miyazaki Japan
4. Department of Pediatric Surgery, Research Field Medicine and Health Sciences, Medical and Dental Sciences Area, Research and Education Assembly Kagoshima University Kagoshima Japan