Article History
Received: 28 April 2020
Accepted: 15 July 2020
First Online: 18 August 2020
Ethics approval and consent to participate
: The study was approved by the Ethical Review Committee of the Jimma University, Institute of Health. Besides, parents’ informed written consent and children’s assent were obtained. Students with a history or active orthodontic treatment were excluded from the study. Confidentiality of information was assured and the privacy of the study populations was respected.
: Not applicable.
: The authors declare that they have no competing interests.