Ethical considerations
The protocol of the present study was approved by the Ethics Committee of Iran University of Medical Sciences with the ethics code: IR.IUMS.REC.1400.297 and Iranian registry of clinical trials with code: IRCT201842739436N10. All participants were fully informed about the objectives and process of the study and informed written consent was obtained from them. The information obtained during the study process remained completely confidential. All patients were told that they could withdraw from the study at any time. No fees were paid for the study and all services were completely free.