Ethical clearance was obtained from Bahir Dar University, College of Medicine and Health Sciences, Ethical Clearance Review Committee namely (Taddesse Dagget, Yinager Workineh, Amlaku Mulat, Abirham Belachew and Chalachew Genet) with protocol number 0051/2020 and Institutional Review Board (IRB) decision number 002.Then; official letter was submitted to FHCSH. The data were collected after getting consent from the hospital manager; since it was retrospective chart review, direct informed consent from the patient was not required. This study didn’t inflict or exposes children to unnecessary risk as a result of reviewing their medical records. Confidentiality of data was kept at all levels of the study and the data was not used for other purposes other than for this study. The study was conducted in accordance with the Declaration of Helsinki relevant guidelines and regulations.

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