[1] Obafemi Awolowo Univ, Dept Obstet Gynecol & Perinatol, Teaching Hosp Complex, Ife, Osun, Nigeria
[2] World Assoc Trainees Obstet & Gynecol WATOG, Paris, France
[3] Int Federat Gynecol & Obstet FIGO Comm Childbirth, London, England
[4] Irrua Specialist Teaching Hosp, Dept Internal Med, Dermatol & Venereol Unit, Irrua, Edo, Nigeria
[5] Univ Port Harcourt, Univ Port Harcourt Teaching Hosp, Dept Obstet & Gynecol, Port Harcourt, Rivers, Nigeria
[6] Univ Hlth & Allied Sci, Dept Obstet & Gynecol, Ho, Ghana
[7] Edo State Univ, Dept Med, Uzairue, Edo, Nigeria
[8] Univ Teaching Hosp, Lusaka, Zambia
[9] Obafemi Awolowo Univ, Dept Dermatol & Venereol, Ife, Osun, Nigeria
[10] Univ Uyo Teaching Hosp, Dept Internal Med, Dermatol Unit, Uyo, Nigeria
[11] Univ Lagos, Coll Med, Fac Clin Sci, Dept Med, Akoka, Lagos, Nigeria
[12] Irrua Specialist Teaching Hosp, Inst Viral Hemorrhag Fever & Emergent Pathogen, Dept Obstet & Gynecol, Irrua, Edo, Nigeria
[13] West Suffolk NHS Trust, Dept Obstet & Gynecol, Bury St Edmunds, England
[14] Fed Med Ctr, Dept Obstet & Gynecol, Yenagoa, Bayelsa, Nigeria
[15] Ogun State Primary Healthcare Board, Abeokuta, Ogun, Nigeria
[16] Fed Univ, Teaching Hosp, Dept Obstet & Gynecol, Owerri, Imo, Nigeria
[17] Imo State Univ, Dept Publ Hlth, Owerri, Imo, Nigeria
[18] Obafemi Awolowo Univ, Coll Hlth Sci, Fac Clin Sci, Dept Obstet Gynecol & Perinatol, Ife, Osun, Nigeria
[19] Nigeria Ctr Dis Control, Dept Prevent Programme & Knowledge Management, Pasadena, Nigeria
[20] Obafemi Awolowo Univ, Teaching Hosp Complex, Dept Obstet Gynecol & Perinatol, Feto Maternal Med Unit, Ife, Osun, Nigeria
[21] Niger Delta Univ, Teaching Hosp, Dept Internal Med, Infect Dis Unit, Okolobiri, Bayelsa, Nigeria