1. Federal Medical Centre; Idi-Aba; Abeokuta Nigeria
2. Newcastle University; Newcastle upon Tyne UK
3. Soba University Hospital; University of Khartoum; Khartoum Sudan
4. Northumbria Healthcare National Health Service Foundation Trust; North Tyneside General Hospital; North Shields UK
5. Kilimanjaro Christian Medical Centre; Moshi United Republic of Tanzania