1. Department of Anesthesia, Stavanger University Hospital, 4011 Stavanger, Norway
2. Faculty of Health Sciences, University of Stavanger, 4021 Stavanger, Norway
3. Haydom Lutheran Hospital, Haydom 9000, Tanzania
4. School of Public Health and Social Sciences, Muhimbili University of Health and Allied Sciences, Dar es Salaam 65001, Tanzania
5. Department of Pediatrics, Muhimbili National Hospital, Dar es Salaam 65000, Tanzania
6. Department of Mathematics and Physics, University of Stavanger, 4021 Stavanger, Norway
7. Department of Research, Stavanger University Hospital, 4011 Stavanger, Norway
8. Reproductive and Child Health Section, Ministry of Health, Dodoma 743, Tanzania
9. Department of Health, President’s Office Regional Authority and Local Government, Dodoma 1923, Tanzania