[1] Univ Jos, Dept Microbiol, Fac Nat Sci, Jos, Nigeria
[2] Jos Univ Teaching Hosp, HIV Treatment Ctr, Jos, Nigeria
[3] Univ Cape Town, Inst Infect Dis & Mol Med, Cape Town, South Africa
[4] Univ Cape Town, Div Med Virol, Dept Pathol, Fac Hlth Sci, Cape Town, South Africa
[5] Univ Jos, Dept Pharmacol & Clin Pharm, Jos, Nigeria
[6] Univ Jos, Africa Ctr Excellence Phytomed Res & Dev ACEPRD, Jos, Nigeria
[7] Benue State Univ, Dept Epidemiol & Community Hlth, Makurdi, Nigeria