[1] Univ Zimbabwe, Coll Hlth Sci, Dept Surg Sci, Harare, Zimbabwe
[2] Univ Oxford, Nuffield Dept Surg Sci, Oxford, England
[3] Univ Teaching Hosp, Lusaka, Zambia
[4] Lagos Univ Teaching Hosp, Dept Surg, Paediat Surg Unit, Idi Araba, Lagos, Nigeria
[5] Great Ormond St Hosp Sick Children, Dept Specialist Neonatal & Paediat Surg, London, England
[6] Univ Lagos, Coll Med, Dept Surg, Lagos, Nigeria
[7] Muhimbili Natl Hosp, Dept Paediat Surg, Dar Es Salaam, Tanzania
[8] Univ Zimbabwe, Parirenyatwa Hosp, Coll Hlth Sci, Dept Surg, Mazowe St, Avondale, Harare, Zimbabwe