University of Cape Town, Cape Town, South Africa
University of the Witwatersrand, Johannesburg, South Africa
University of Nairobi, Nairobi, Kenya
Hospital del Henares, Madrid, Spain
Birmingham Dental Hospital and School of Dentistry, Birmingham, West Midlands, United Kingdom
Queen Elizabeth UHB Hospital, Birmingham, West Midlands, United Kingdom
Queen Elizabeth Hospital Birmingham, University Hospitals Birmingham NHS Foundation Trust, Birmingham, United Kingdom
Charing Cross Hospital, Imperial College Healthcare NHS Trust, London, United Kingdom
Salford Royal Hospital, Northern Care Alliance NHS Foundation Trust, Manchester, United Kingdom
University of Birmingham, Birmingham, United Kingdom
Clinic of Coloproctology and Minimally Invasive Surgery, Moscow, Russian Federation
Liver Unit, University Hospital Birminghmam, Birmingham, West Midlands, United Kingdom
Groote Schuur Hospital, Cape Town, South Africa
Moseley Hall Hospital, Birmingham, West Midlands, United Kingdom
The Wellington Hospital, London, United Kingdom