1. Faculty of Biology Medicine and Health, The University of Manchester, Manchester
2. Internal Medicine Department, LAUTECH Teaching Hospital, Oyo, Nigeria
3. Faculty of Medicine, Dow Medical College, Dow University of Health Sciences, Karachi, Pakistan
4. Faculty of Medicine, University of St Andrews, St Andrews, UK
5. Academic Unit of Gastroenterology, Sheffield Teaching Hospitals, Sheffield
6. School of Medicine and Population Health, The University of Sheffield, Sheffield
7. Faculty of Medicine, University of Khartoum, Khartoum, Sudan