1 The St Mark's Centre for Familial Intestinal Cancer, St Mark's Hospital, London North West University Healthcare NHS Trust, London, UK. s.clark8@nhs.net.
2 Department of Surgery and Cancer, Imperial College, London, UK. s.clark8@nhs.net.
3 The St Mark's Centre for Familial Intestinal Cancer, St Mark's Hospital, London North West University Healthcare NHS Trust, London, UK.
4 Department of Surgery and Cancer, Imperial College, London, UK.
5 Institute of Genetics and Cancer, The University of Edinburgh, Western General Hospital Campus, Edinburgh, UK.
6 Institute of Cancer and Genomic Sciences, College of Medical and Dental Science, University of Birmingham, Birmingham, UK.
7 Department of Surgery, Queen Elizabeth Hospital, Birmingham, UK.
8 Department of Colorectal Surgery, Central Manchester University Hospitals NHS Foundation Trust, Manchester, UK.
9 Clinical Genetics Service, Manchester Centre for Genomic Medicine, Central Manchester University Hospitals NHS Foundation Trust, Manchester, UK.
10 Division of Population Medicine, School of Medicine, Cardiff University, Cardiff, UK.
11 Department of Colorectal Surgery, University Hospital of Wales, Cardiff, UK.
12 Department of Gastroenterology, University Hospital Llandough, Cardiff, UK.
13 Department of Medical Genetics, Cardiff University, Cardiff, UK.
14 Department of Gastroenterology and Hepatology, Royal Liverpool University Hospital, Liverpool, UK.
15 Department of Colorectal Surgery, Royal Liverpool University Hospital, Liverpool, UK.
16 Colorectal Unit, University Hospitals Southampton NHS Foundation Trust, Southampton, UK.
17 Wessex Clinical Genetics Service, University Hospital Southampton NHS Foundation Trust, Southampton, UK.
18 Royal Devon University HealthCare NHS Foundation Trust, Exeter, UK.