1. Department of Surgical Oncology, McGill University Health Centre, Montreal, QC H4A 3J1, Canada
2. Department of Surgery, University of Kansas School of Medicine, Wichita, KS 67214, USA
3. Department of Surgery, The Ottawa Hospital and Research Institute, University of Ottawa, Ottawa, ON K1H 8L6, Canada
4. Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
5. Department of Surgery, Fondazione IRCCS Istituto Nazionale Dei Tumori, 20133 Milan, Italy
6. Department of Radiation Oncology, McGill University Health Centre, Montreal, QC H4A 3J1, Canada