Received: 6 June 2020
Accepted: 25 August 2020
First Online: 2 September 2020
Ethics approval and consent to participate
: The research was conducted after obtaining an ethical clearance letter from the School of Biomedical and Laboratory Science Ethical Review Committee. A permission letter was obtained from the University of Gondar compressive specialized hospital. Written informed consent was obtained from each selected mother after explaining the aim of the study with the potential adverse effects during sample collection. The results of the study participants were used without personal identifiers and only used for research purpose.
: Not applicable.
: The authors declare that they have no competing interests.