Chelsea and Westminster Hospital NHS Foundation Trust, London, United Kingdom
Liverpool Women's NHS Foundation Trust, Liverpool, United Kingdom
Aintree Hospitals NHS Trust, Liverpool, United Kingdom
St. Mary's Hospital, London, England, United Kingdom
Asan Medical Center - University of Ulsan College of Medicine, Seoul, Korea, Republic of
West Middlesex University Hospital, Isleworth, England, United Kingdom
St Mary's Hospital, London, United Kingdom
Imperial College Healthcare NHS Trust, London, United Kingdom
The Kennedy Institute Clinical Trials Unit, 4 West, Charing Cross Hospital, London, United Kingdom
Imperial College Academic Healthcare Trust, London, United Kingdom
Imperial College London, Hammersmith Hospital, London, United Kingdom
Wolfson Unit for Endoscopy, St Mark's Hospital, Harrow, Moddlesex, United Kingdom
Imperial NHS Trust, St Mary's Hospital, Praed Street, London, United Kingdom
Imperial College Healthcare NHS Trust, London, United Kingdom