*Section of Gastrointestinal Surgery, Hospital del Mar, Department of Surgery, Universitat Autònoma de Barcelona, Hospital del Mar Medical Research Institute (IMIM), Barcelona, Spain

†Department of Pathology, Hospital Universitario del Mar, Cancer Research Program, Hospital del Mar Medical Research Institute (IMIM), Barcelona, Spain

‡Department of Surgery, Hospital Universitari Germans Trias i Pujol, Universitat Autònoma de Barcelona, Badalona, Barcelona, Spain

§Department of Surgery, Hospital Universitario de Donostia, Donostia, Spain

∥Department of Surgery, Hospital Universitari de Bellvitge, L′Hospitalet de Llobregat, Barcelona, Spain

¶Department of Surgery, Hospital Universitari Vall d′Hebron, Universitat Autónoma de Barcelona, Barcelona, Spain

#Department of Surgery, Hospital Universitario de Navarra, Pamplona, Spain

**Department of Surgery, Hospital Universitario de Araba, Vitoria, Spain

††Department of Surgery, Hospital Universitario de Basurto, Bilbao, Spain

‡‡Department of Surgery, Hospital Universitari Arnau de Vilanova, Lleida, Spain

§§Department of Surgery, Hospital Universitari Josep Trueta, Girona, Spain

∥∥Department of Surgery, Hospital de Sant Joan Despí Moisès Broggi, Sant Joan Despí, Barcelona, Spain

¶¶Department of Surgery, Hospital Universitari Parc Taulí de Sabadell, Sabadell, Barcelona, Spain

##Department of Surgery, Hospital de la Santa Creu i Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain

***Department of Surgery, OSI EE-Cruces, UPV/EHU, IIS Biocruces, Bizkaia, Spain

†††Department of Surgery, Hospital Universitari de Tarragona, Joan XXIII, Tarragona, Spain

‡‡‡Department of Surgery, Hospital Universitari Mútua Terrassa, Terrassa, Barcelona, Spain

M.P. and J. G. first co-authorship.

No funding was received for this work.

The authors report no conflicts of interest.

[email protected]

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