[1] Univ Dodoma, Sch Med & Dent, Dept Surg, Dodoma, Tanzania
[2] Muhimbili Natl Hosp, Dept Emergency Med, Dar Es Salaam, Tanzania
[3] Catholic Univ Hlth & Allied Sci, Dept Otorhinolaryngol, Mwanza, Tanzania
[4] Muhimbili Univ Hlth & Allied Sci, Dept Otorhinolaryngol, Dar Es Salaam, Tanzania