Received: 30 December 2020
Accepted: 5 April 2021
First Online: 14 April 2021
: The Institutional Ethics Committee of Faculty of Medical Laboratory Sciences, University of El Imam El Mahdi approved the study. As children who are 5 years and below are involved in the study and their parents were involved in the questionnaire, and the informed consent was obtained from their parents or legal guardians for themselves and on behalf of their children. All participants were adequately informed about their rights, responsibilities, and all the relevant guidelines or aspects of the research. Also, all methods were performed in accordance with the relevant guidelines and regulations/declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.