Ethics approval and consent to participate
The patients who participated in this study were informed about the methodology and study purposes and enrolled as volunteers, with a signed consent letter. All the procedures were in accordance to the Helsinki Declaration regarding human research and were reviewed and approved by the Medical Ethics Board of Tehran University of Medical Sciences, Tehran, Iran (with code no. IR.TUMS.VCR.REC.1396.4691). This study has also been registered in Iranian registry of clinical trials and received a clinical trial code (IRCT ID: IRCT20170531034272N2).