Ethical clearance was obtained from the Salale University Ethical Review Committee and it was given to selected institutions. Then permission was granted from each institution. All eligible study participants were informed about the purpose of the study, and interviews were held only with those who agreed to give written/fingerprint consent to participate. The consent process was approved by Salale University Ethical Review Committee. All responses were kept confidential. The study was conducted according to the Declaration of Helsinki.

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