1. 1Department of Surgery, School of Medical Sciences, Orebro University Hospital and Orebro University, Orebro, Sweden; email: olle.ljungqvist@oru.se
2. 2Department of Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden
3. 3Department of General, Visceral, and Oncologic Surgery, Saint George Hospital, Leipzig, Germany
4. 4Department of Medicine, Surgery, and Neuroscience and Unit of General and Oncologic Surgery, University of Siena, Siena, Italy
5. 5Section of Anesthesia and Critical Care, Department of Anesthesia and Critical Care, Azienda Ospedaliero-Universitaria Careggi, University of Florence, Florence, Italy
6. 6School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
7. 7HPB Surgery, Foundation IRCCS San Gerardo Hospital, Monza, Italy