Professor P. Ronan O’Connell BA MD FRCSI FRCSGlasg FRCSEd FRCSEng (Hon) FCSHK(Hon) President, Royal College of Surgeons in Ireland President, European Surgical Association Emeritus Professor of Surgery University College Dublin Dublin, Ireland Professor O’Connell has served as an editor of the British Journal of Surgery and associate editor of Diseases of the Colon and Rectum. He has been editor in chief for the European Surgical Association and joint editor of Bailey and Love’s Short Practice of Surgery for the 25th, 26th 27th and now 28th editions, having contributed chapters to the 23rd and 24th editions. Apart from his editing, Prof O’Connell is widely published in the areas of IBD, colorectal cancer and pelvic floor physiology. He is a Council member of the Royal College of Surgeons in Ireland and holds ad hominum fellowships of the Glasgow and Edinburgh Royal Colleges. He is a past President of the European Society of Coloproctology and honorary fellow of the American Surgical Association and the American Society of Colon and Rectal Surgeons. Professor Andrew W. McCaskie, MMus MD FRCS FRCSENG (Tr and Orth) Professor of Orthopaedic Surgery and Head of Department of Surgery University of Cambridge, Honorary Consultant, Addenbrooke’s Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK Professor Andrew McCaskie is Professor of Orthopaedic Surgery and Head of Department of Surgery at the University of Cambridge. He trained in Leeds, Leicester and Newcastle upon Tyne, where he was Professor of Orthopaedic Surgery until moving to Cambridge in 2013. His clinical interest is the lower limb, and particularly the treatment of osteoarthritis, seeking to develop repair and regenerative therapies at early stages of disease. He is the Director of the Arthritis Research UK Tissue Engineering Centre which brings together UK clinicians, engineers and biologists to develop stem and stromal cell therapy for early osteoarthritis. He has been the President of the British Orthopaedic Research Society, member of the Council of Management of The British Editorial Society of Bone and Joint Surgery, and member of Council of the British Orthopaedic Association. He is currently the Director of the Academic Foundation Programme in Cambridge and is widely published, including papers in The Lancet and Nature Genetics. Professor Robert D Sayers MBChB(Hons) MD AFHEA FRCSEng George Davies Chair of Vascular Surgery University of Leicester and Glenfield Hospital Leicester, UK Member of the Court of Examiners, Royal College of Surgeons of England. Royal College of Surgeons Surgical Tutor, Leicester Royal Infirmary. Member of the Critical Care Steering Group, Royal College of Surgeons of England.