1. Beit CURE International Hospital, PO Box 31236, Blantyre 3, Malawi.
2. The Robert Jones and Agnes, Hunt Orthopaedic and District Hospital NHS Trust, Oswestry, Shropshire SY10 7AG, UK.
3. Department of Vascular Surgery, Imperial College London, 4th Floor, Charing Cross Hospital, Fulham Palace Road, London W6 8RF, UK.
4. Barking, Havering and Redbridge University Hospitals, NHS Trust, Rom Valley Way, Romford, Essex RM7 0AG, UK.