[1] Univ Liverpool, Liverpool Brain Infect Grp, Inst Infect & Global Hlth, Liverpool, Merseyside, England
[2] Malawi Liverpool Wellcome Trust Clin Res Programm, POB 30096, Blantyre 3, Malawi
[3] Univ Cape Town, Groote Schuur Hosp, Dept Med, Cape Town, South Africa
[4] Bafoussam Reg Hosp, Dept Neurol, Bafoussam, Cameroon