Funding for this research was provided by:
Babol University of Medical Sciences
Received: 26 March 2020
Accepted: 18 March 2021
First Online: 8 April 2021
: The research was approved by the research ethics committee of National Institute of Health Research (reference number: IR.TUMS.NIHR.REC.1396.53). The written informed consent was signed by every participant. For disabled persons and children under the age of 15, their legal guardians or parents signed the informed consent.
: Not applicable.
: The authors declare that they have no competing interests.