Received: 22 June 2019
Accepted: 19 January 2020
First Online: 29 January 2020
Ethics approval and consent to participate
: The Ethics Committee of Royan Institute, Tehran, Iran, approved this study (Registration Number: IR.ACECR.ROYAN.REC.1397.47). The patients were informed about the aim of the study and were assured of confidentiality, and a verbal informed consent was obtained from all participants before data collection.
: Not applicable.
: The authors declare that they have no competing interests.