1. Department of Internal Medicine, Gulu Medical School, Gulu University , Gulu , Uganda
2. St Mary’s Hospital, Lacor , Gulu , Uganda
3. THS, Faculty of Medicine, University of Bristol , Bristol, BS10 5NB , UK
4. Royal United Hospital , Bath, BA1 3NG , UK
5. Gloucestershire Hospitals NHS Trust , Cheltenham, GL53 7AN , UK