James Brierley, MBBS, FRCP, FRCPSC, FRCR, is Emeritus Professor of Radiation Oncology, University of Toronto, Canada.

Meredith Giuliani, MBBS, Med, PhD, FRCPC, DRCPSC, is Director at the Cancer Education Princess Margaret Cancer Centre, Canada and Associate Professor at the Department of Radiation Oncology, University of Toronto, Canada

Brian O'Sullivan MB, BCh, FRCPC, FRCPI, FFRRCSI (Hon) is Professor, Department of Radiation Oncology, Centre Hospitalier de l'Universite (CHUM), Montreal, Canada

Brian Rous, MB, Bchir, MA, PhD, FRCPath, is a Consultant Histopathologist at Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK

Elisabeth Van Eycken, MD, is Director of the Belgian Cancer Registry, Brussels, Belgium.