[1] Univ Lagos, Idi Araba, Nigeria
[2] Univ Nottingham, Nottingham, England
[3] Univ Nottingham, Sch Med, Nottingham, England
[4] NHS Trust, City Hosp, Nottingham, England
[5] King Abdulaziz Univ, Jeddah, Saudi Arabia
[6] Inst Jules Border, Brussels, Belgium