Ethic approval and consent to participate
The ethical confirmation for this study was obtained from the Ethical Committee of Yazd University (IR.YAZD.REC.1400.061). Importantly, consent scripts, forms and protocols were also approved by Ethical Committee of Yazd University. Formal written informed consent was obtained from all legal guardians of interview participants. This research is controlled by the internal committee of Yazd University, which is based on the Declaration of Helsinki.