1. Department of Minimally Invasive Digestive Surgery; Antoine Béclère Hospital; Clamart France
2. Paris-Sud University; Orsay France
3. Department of Surgery; Wesley Medical Centre; Auchenflower Queensland Australia
4. Department of Surgery; Maastricht University Medical Center; Maastricht The Netherlands
5. Department of Hepatobiliary Surgery; Fujita Health University; Toyoake Aichi Japan
6. Department of Surgery; Iwate Medical University School of Medicine; Morioka Iwate Japan