[1] Lagoon Hosp, Dept Surg, Lagos, Nigeria
[2] Babcock Univ, Teaching Hosp, Dept Surg, Ilishan Remo, Nigeria
[3] Fed Med Ctr, Dept Surg, Owo, Nigeria
[4] Nnamdi Azikiwe Univ, Teaching Hosp, Dept Surg, Nnewi, Nigeria
[5] Delta State Univ, Teaching Hosp, Dept Surg, Oghara, Nigeria
[6] Aminu Kano Teaching Hosp, Dept Surg, Kano, Nigeria
[7] Lagos State Univ Teaching Hosp, Dept Surg, Ikeja, Nigeria
[8] Univ Maiduguri, Dept Surg, Teaching Hosp, Maiduguri, Nigeria
[9] Univ Coll Hosp, Dept Neurosurg, Ibadan, Nigeria
[10] Univ Abuja, Dept Surg, Teaching Hosp, Abuja, Nigeria
[11] Univ British Columbia, Dept Neurosci, Vancouver, BC, Canada
[12] Natl Hosp, Dept Surg, Abuja, Nigeria
[13] Johns Hopkins Univ, Sch Med, Dept Neurosurg, Baltimore, MD USA
[14] Duke Univ, Div Global Neurosurg & Neurol, Durham, NC 27708 USA
[15] Duke Univ, Global Hlth Inst, Durham, NC USA
[16] Duke Univ, Sch Med, Durham, NC USA
[17] Washington Univ, Sch Med, St. Louis, MO USA
[18] Univ Florida, Dept Neurosurg, Gainesville, FL USA
[19] Univ Cambridge, Sch Clin Med, Cambridge, England
[20] Duke Univ, Pratt Sch Engn, Durham, NC USA
[21] Michigan State Univ, Coll Human Med, E Lansing, MI USA
[22] Univ Florida, Coll Med, Gainesville, FL USA
[23] Campbell Sch Osteopath Med, Lillington, NC USA
[24] Duke Univ, Med Ctr Lib & Arch, Durham, NC USA
[25] Univ Nigeria, Dept Surg, Teaching Hosp, Enugu, Nigeria
[26] Duke Univ, Med Ctr, Dept Neurosurg, Durham, NC 27708 USA