1. Department of Surgery, Máxima Medical Center, Veldhoven, the Netherlands
2. Department of Anesthesia, Montreal General Hospital, McGill University Health Center, Montreal, Quebec, Canada
3. Department of Anesthesia, Hospital Clínic de Barcelona, Barcelona, Spain
4. Department of Mathematics and Computer Science, Eindhoven University of Technology, Eindhoven, the Netherlands
5. IDIBAPS, University of Barcelona, Barcelona, Spain
6. Physical Medicine and Rehabilitation Department, Hospital Clínic de Barcelona, Barcelona, Spain
7. Department of Medical Sciences, University of Ferrara, Ferrara, Italy
8. Unit of Provincial General Surgery, Azienda Unità Sanitaria Locale Ferrara, Ferrara, Italy
9. Department of Surgery, Amphia, Breda, the Netherlands
10. Center for Surgical Science, Zealand University Hospital, Roskilde, Denmark
11. Department of Surgery, Slagelse Hospital, Slagelse, Denmark
12. Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
13. Department of Surgery, Zealand University Hospital, Køge, Denmark
14. for the PREHAB Study Group