Received: 5 December 2019
Accepted: 30 April 2020
First Online: 12 May 2020
Ethics approval and consent to participate
: This study was approved by the Research Ethics Committee of the College of Health Sciences, Hawler Medical University, and administrative permission was obtained from Erbil Raperin Paediatric Hospital and Hawler Teaching Hospital. Oral consent was obtained from parents/guardians of children to participate in this study.
: Not applicable.
: The authors declare that they have no competing interests.