Acknowledgements
RECRUITMENT
The authors would like to thanks Dr Paroz A., Dr Vuilleumier H. and Dr Donadini A. for their respective contribution to the study, regarding the design, the implementation and patient’s recruitment. The authors declare that they have no conflict of interest. Abdominal wall ultrasound carried out systematically on post-operative day 30 were supported by the research fund of the Visceral Surgery Department of Lausanne University Hospital CHUV, Lausanne, Switzerland.