1. Department of Surgery, Hospital General de Granollers, Granollers
2. School of Medicine, Universitat Internacional de Catalunya, Sant Cugat del Vallès
3. Servei d’Estadística Aplicada, Universitat Autònoma de Barcelona, Bellaterra, Barcelona
4. VINCat Program, Catalonia
5. Department of Infectious Diseases, Hospital Universitari Parc Taulí, Sabadell
6. Department of Surgery, Hospital Universitari de Bellvitge, L’Hospitalet de Llobregat
7. Colorectal Surgery Unit, Department of Surgery, Hospital Universitari Germans Trias i Pujol, Badalona, Barcelona
8. Universitat Autónoma de Barcelona, Catalonia
9. Department of Anaesthesiology, Hospital Universitari Vall d’Hebrón
10. Department of Surgery, Hospital del Mar
11. Department of Surgery, Hospital Universitari Vall d’Hebrón
12. Department of Infectious Diseases, Hospital Universitari de Bellvitge, L’Hospitalet de Llobregat, Barcelona
13. Centro de Investigación Biomédica en Red de Enfermedades Infecciosas (CIBERINFEC, CB21/13/00009), Instituto de Salud Carlos III, Madrid
14. Universitat de Barcelona
15. Department of Infectious Diseases, Hospital Universitari de Bellvitge
16. IDIBELL, L’Hospitalet de Llobregat, Barcelona, Spain