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Article History

Received: 15 March 2018

Accepted: 14 June 2018

First Online: 25 June 2018

Ethics approval and consent to participate

: The study protocol was reviewed and approved by the Research and Ethical Committee of the School of Public Health, and the Institutional Review Board of the College of Health Sciences, Addis Ababa University. Because of the retrospective nature of the study, informed consent from patients was not required. A letter of support was obtained from the Gurage Zone Department of Health to obtain information from all districts and health facilities. Personal identifiers of the cases were coded prior to analysis, and medical records were kept in a secure place to help maintain the confidentiality of the clinical information of cases.

: Not applicable.

: The authors declare that they have no competing interests.

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