[1] Univ Nigeria, Dept Paediat, Enugu Campus, Enugu, Nigeria
[2] Ahmadu Bello Univ, Dept Paediat, Zaria, Kaduna, Nigeria
[3] Olabisi Onabanjo Univ, Dept Med, Shagamu, Ogun, Nigeria
[4] Lead City Univ, Dept Publ Hlth, Ibadan, Oyo, Nigeria
[5] Univ Abuja, Dept Obstet & Gynecol, Abuja, Nigeria
[6] Benue State Univ, Dept Epidemiol & Community Med, Makurdi, Benue, Nigeria
[7] Nigerian Inst Med Res, Dept Microbiol, Lagos, Nigeria
[8] Nigerian Inst Med Res, Dept Clin Sci, Lagos, Nigeria
[9] Nigerian Inst Med Res, Ctr Human Virol & Genom, Lagos, Nigeria
[10] Univ Lagos, Coll Med, Dept Med, Lagos, Nigeria
[11] Univ Nigeria, Dept Vet Pathol & Microbiol, Nsukka, Nigeria
[12] Ibrahim Badamasi Babangida Univ, Dept Biol Sci, Lapai, Niger, Nigeria
[13] Univ Calabar, Dept Med, Calabar, Cross River, Nigeria
[14] Natl Inst Pharmaceut Res & Dev, Dept Med Plant Res & Tradit Med, Abuja, Nigeria
[15] Univ Calabar, Dept Community Med, Calabar, Cross River, Nigeria
[16] Nnamdi Azikiwe Univ, Dept Biochem, Awka, Anambra, Nigeria
[17] Obafemi Awolowo Univ Teaching Hosptal Complex, Dept Oral & Maxillofacial Surg, Ife, Nigeria
[18] Obafemi Awolowo Univ, Dept Nursing Sci, Ife, Nigeria
[19] Univ Ibadan, Coll Med, Dept Nucl Med, Ibadan, Nigeria
[20] Bayero Univ, Dept Haematol, Kano, Kano, Nigeria
[21] Univ Jos, Dept Microbiol, Jos, Nigeria
[22] Univ Ibadan, Coll Med, Ibadan, Nigeria