1. Department of General Surgery, Kilimanjaro Christian Medical Centre, Moshi, Tanzania
2. Kilimanjaro Christian Medical University College, Faculty of Medicine, Moshi, Tanzania
3. Department of Otorrhinolaryngology, Kilimanjaro Christian Medical Centre, Moshi, Tanzania
4. Department of Otorrhinolaryngology, Kilimanjaro Christian Medical University College, Moshi, Tanzania
5. Department of Pediatrics and Child Health, Kilimanjaro Christian Medical Centre, Moshi, Tanzania
6. Department of Pediatrics and Child Health, Kilimanjaro Christian Medical University College, Moshi, Tanzania