Hospital Universitario Vall d'Hebron, Barcelona, Spain
Hull, Cottingham, United Kingdom
UHCW, Coventry, United Kingdom
Samsun Training and Research Hospital General Surgery Clinic, Samsun, Turkey
Erzincan Binali Yıldırım University General Surgery Clinic, Erzincan, Turkey
University of Bologna and St.Orsola-Malpighi Hospital, Bologna, Italy
Gemeinschaftspraxis, Marl, Germany
Royal Sussex County Hospital, Brighton, United Kingdom
Praxis, Fürth, Germany
Schmerzzentrum Frankfurt, Frankfurt, Germany
Gemeinschaftspraxis Tamm-Albert-Schroter-Uhmann, Hannover, Germany
Norfolk & Norwich Hospital, Norwich, United Kingdom
St Marks Hospital, Harrow, United Kingdom
Stepping Hill Hospital, Stockport, United Kingdom
St Thomas' Hospital, Lambeth Palace Road, London, United Kingdom
Sainsbury Wing, St Marks & Northwick Park Hospitals, Watford Road, Harrow, United Kingdom
The Polyposis Registry, St. Mark's Hospital,, Harrow, Middlesex, United Kingdom
Derby City General Hospital, Derby, Derbyshire, United Kingdom
University Hospital of Warwick and Coventry, Coventry, United Kingdom
St Marks Hospital, Harrow, United Kingdom
St. George's Hospital Medical School, London, United Kingdom
S. Orsola Hospital, Bologna, Italy