1. Department of Surgery, Azienda Unità Sanitaria Locale Ferrara, University of Ferrara, Via Valle Oppio, 2 –44023 Lagosanto (FE), Italy
2. Institute for Health Research Aragón, 50009 Zaragoza, Spain
3. Department of Surgery, Faculty of Medicine, University of Zaragoza, 50009 Zaragoza, Spain
4. Department of Plastic Surgery, Second Faculty of Medicine, Charles University and Motol University Hospital, 150 06 Prague, Czech Republic
5. Department of Anaesthesia, Resuscitation and Pain Therapy, Miguel Servet University Hospital, 50009 Zaragoza, Spain
6. Grupo Español de Rehabilitación Multimodal (GERM), 50009 Zaragoza, Spain
7. Department of Surgery, Universidad Miguel Hernández Elche, Hospital General Universitario Elche, 03203 Elche, Spain
8. Department of Surgery, University Hospital Kralovske Vinohrady, 100 34 Prague, Czech Republic
9. Department of Surgery, Second Faculty of Medicine, Charles University and Motol University Hospital, 150 06 Prague, Czech Republic
10. Fourth Department of Surgery, Medical School, Faculty of Health Sciences, Aristotle University of Thessaloniki, General Hospital “George Papanikolaou”, 57010 Thessaloniki, Greece
11. Eupemen Project coordinator, Institute for Health Research Aragón, 50009 Zaragoza, Spain