1 Society of Surgical Oncology, Annals of Surgical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, USA. Charles.balch@utsouthwestern.edu.
2 European Society of Surgical Oncology, British Society of Surgical Oncology, University of Liverpool, Liverpool, UK.
3 Society of Surgical Oncology, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
4 European Society of Surgical Oncology, University of Liverpool, Liverpool, UK.