[1] Hospital Clinic de Barcelona,Service of General and Digestive Surgery, Institute Clinic of Digestive and Metabolic Diseases (ICMDM)
[2] Universitat de Barcelona,General and Digestive Surgery Department
[3] Hospital General de la Plaza de la Salud,General and Digestive Surgery Department, Institut d’Investigacions Biomediques August Pi i Sunyer (IDIBAPS)
[4] Hospital Clinic de Barcelona,undefined
[5] Universitat de Barcelona,undefined