Received: 10 August 2021
Accepted: 21 December 2021
First Online: 15 January 2022
: We obtained the approval of the ethics committee of the faculty of medicine and pharmacy of Oujda (CERBO), N 02/2017, on 08/06/2017.Data collection was made after written parental consent for each children. We carried out this study with respect for patients' anonymity and confidentiality of information.
: Not applicable.
: The authors declare that they have no competing interests.