1. Unit of Innovation in Minimally Invasive Surgery, Department of General and Digestive Surgery, University Hospital “Virgen del Rocio”, University of Sevilla, Sevilla, Spain
2. Unit of General and Digestive Surgery, Hospital QuironSalud Sagrado Corazón, Sevilla, Spain
3. Department of General and Digestive Surgery, Hospital Universitario La Paz, Madrid, Spain
4. Unit of General and Digestive Surgery, Hospital regional Universitario, Málaga, Spain
5. Unit of General and Digestive Surgery, Hospital General de Granollers, Barcelona, Spain
6. Department of Gastrointestinal Surgery (ICMDiM), Hospital Clinic, University of Barcelona, Barcelona, Spain
7. HBP Surgery Unit. Derpartment of General and Digestive Surgery, Hospital Clínico San Carlos, Madrid, Spain
8. Unit of Endocrine and Head and Neck Surgery. Department of General and Digestive Surgery, Parc Tauli, Hospital Universitari, Sabadell, Spain
9. Colorectal Surgery Unit, Hospital Vall d'Hebron, Universitat Autonoma de Barcelona, Barcelona, Spain
10. Unit of General and Digestive Surgery, Hospital Universitario de la Princesa, Madrid, Spain
11. Unit of General and Digestive Surgery, Hospital de Talavera de la Reina, Toledo, Spain
12. Unit of General and Digestive Surgery, Hospital Gregorio Marañón, Madrid, Spain
13. Unit of General and Digestive Surgery, Hospital Universitario de Getafe, Madrid, Spain
14. Department of Surgery, Complejo Hospitalario Universitario de Vigo, Vigo, Spain
15. Servicio de Cirugía General, Hospital Morales Meseguer, Universidad de Murcia, Campus Mare Nostrum, Murcia, Spain