[1] George Washington Univ, Sch Med & Hlth Sci, Dept Neurosurg, Washington, DC 20052 USA
[2] Univ Calif San Francisco, Sch Med, San Francisco, CA USA
[3] Icahn Sch Med Mt Sinai, Dept Neurosurg, New York, NY 10029 USA
[4] Hargeisa Grp Hosp, Dept Emergency Med, Hargeisa, Somalia
[5] Edna Adan Hosp, Dept Surg, Hargeisa, Somalia
[6] Royal Care Hosp, Dept Surg, Hargeisa, Somalia
[7] Mekelle Univ, Dept Neurosurg, Addis Ababa, Ethiopia
[8] Eastern Virginia Med Sch, Norfolk, VA 23501 USA
[9] Yale Univ, Dept Emergency Med, New Haven, CT USA
[10] George Washington Univ, Med Ctr, Off Dean, Washington, DC 20037 USA
[11] Northwestern Univ, Feinberg Sch Med, Dept Neurol Surg, Chicago, IL 60611 USA