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Article History

Received: 8 February 2019

Accepted: 29 October 2019

First Online: 9 November 2019

Ethics approval and consent to participate

: Ethical clearance was obtained from institutional review board of the University of Gondar. There were no risks due to participation in this research. The collected data were used only for this research purpose. Verbal informed consent was obtained from the participants. Informed verbal consent was also obtained from the parents for participants aged below 18 years. The verbal consent was approved by the institutional review board of the University of Gondar. Confidentiality was granted for the information collected from each worker and privacy during the interview was ensured. The interviews were administered without the presence of managers or supervisors to ensure privacy.

: This manuscript does not contain any individual person’s data.

: The authors declare that they have no competing interests.