Michael Douek MB ChB MD FRCS (Eng) FRCS (Gen) EBSQ (Breast)Rosetrees and Royal College of Surgeons of England Director of Surgical Interventional Trials Unit, and Professor of Surgical Sciences and Breast Cancer, Nuffield Department of Surgical Sciences, University of Oxford, UKRachel Hargest BSc MBBS FRCS MD FRCS (Gen)Co-Director, Global Surgery Policy Unit, Royal College of Surgeons of England & London School of Economics and Political Science; Co-Lead, World Health Organisation Collaborating Centre for Health Policy and Impact in Emergency, Critical and Operative (ECO) Care; Clinical Senior Lecturer in Colorectal Surgery, Cardiff China Medical Research Collaborative and Honorary Consultant Surgeon, University Hospital of Wales and Velindre Hospital, Cardiff, UK