Article History
Received: 11 February 2021
Accepted: 1 July 2021
First Online: 22 July 2021
Declarations
:
: The study has been approved by the Ethics Committee of the Ministry of Health, Jerusalem, 2018. Children examinations were approved by their parents. Examination was not performed if a child or his / her parents refused to participate.
: Not applicable.
: The authors declare that they have no competing interests.