Funding for this research was provided by:
Tehran University of Medical Sciences and Health Services (96-04-161-37647, 96-04-54-36870)
Received: 6 January 2020
Accepted: 13 February 2020
First Online: 24 February 2020
Ethics approval and consent to participate
: The study protocol was in accordance with Helsinki Declaration, and was approved by the ethics committee of Tehran university of medical sciences (ethics code: IR.TUMS.VCR.REC.1397.170, approve date: 2018-04-08). Also, at the beginning of the study, after describing the aims and possible risks or benefits of the trial, all participants provided written informed consent. The trial is registered in the Iranian registry of clinical trials (IRCT) with IRCT code: IRCT20151128025267N6. This research has been supported by Tehran University of Medical Sciences grant number 96–04–161-37647 and 96–04–54-36870.
: All authors consented.
: The authors declare that they have no competing interests.