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.