1. Brighton and Sussex Medical School, Medical School BuildingBiology Road, University of Sussex FalmerBN1 9PX United Kingdom
2. Department of Surgery and CancerImperial College London, Human Anatomy Unit, Laboratory Block, Charing Cross Campus, St Dunstan's RoadLondonW6 8RP United Kingdom
3. Department of Surgery and CancerImperial College, London, St Mary's Hospital, Praed Street LondonW2 1NY United Kingdom