Received: 26 February 2020
Accepted: 3 June 2020
First Online: 11 June 2020
Ethics approval and consent to participate
: All the participants were aware of the research team and used methodology before implementing the research plan. An oral and written informed consent was obtained for each voluntary participant. The study was entirely consistent with the principles of the declaration of Helsinki and the Nuremberg Code. This study was approved by the Ethics Committee of Tehran University of Medical Sciences, the project approval number is IR.TUMS.MEDICINE.REC.1397.101.
: Not applicable.
: The authors declare that they have no competing interests.