1 From the Division of Digestive Health, Department of Surgery and Cancer, 10th Floor QEQM Wing, St Mary's Hospital Campus, Imperial College London W2 1NY, UK [email protected].
2 Excellence and Friends Management Care Centre (EFMC), Dutse Abuja FCT, Nigeria.
3 Royal College of Physicians of London, 11 St Andrews Place, Regent's Park, London NW1 4LE, UK.
4 West African College of Physicians (WACP), 6 Taylor Drive, Off Edmond Crescent, Yaba Lagos, Nigeria Address correspondence to: Prof Simon D. Taylor-Robinson, Division of Digestive Health, Department of Surgery and Cancer 10th Floor QEQM Wing, St Mary's Hospital Campus, Imperial College London, South Wharf Street, London W2 1NY, UK.