Funding for this research was provided by:
Tehran University of Medical Sciences and Health Services (IR.IUMS.FMD.REC1396.9413373004)
Received: 16 February 2020
Accepted: 29 December 2020
First Online: 12 January 2021
Ethics approval and consent to participate
: The research project was confirmed by the Ethics Committee of Iran University of Medical Sciences, Tehran, Iran, with the ethics code of IR.IUMS.FMD.REC1396.9413373004. After obtaining a sampling license from Iran University of Medical Sciences, sampling was started at the infertility centers. The participants were asked to sign a written informed consent. Respondents were completely informed of the study purpose and procedures. In addition, they were assured of the confidentiality of information.
: Not applicable.
: The datasets used and analyzed during the current study are available from the corresponding author on reasonable request.
: The authors declare that they have no competing interests.