Funding for this research was provided by:
Received: 17 February 2021
Accepted: 16 August 2021
First Online: 29 August 2021
Change Date: 9 September 2021
Change Type: Correction
Change Details: A Correction to this paper has been published:
Change Details: https://doi.org/10.1186/s13102-021-00339-4
: The objectives and procedures of this study were explained to the participants, and written informed consent was obtained from all participants and also from their parents or legal guardians before the beginning of the study that was in accordance with the Declaration of Helsinki. The research protocol was approved by the Ethics Committee of Razi University of Iran (code: IR.RAZI.REC.1399.007).
: The person on the pictures has provided written consent for publication.
: The authors declare that they have no competing interests.