Ethical approval and consent to participate
This study is the result of a master’s thesis approved by the Ethics Committee of Guilan University of Medical Sciences in Rasht, Iran (Approval ID: IR.GUMS.REC. 1398.131; Approval Date: 26/06/2019), and the Iranian Registry of Clinical Trials (No: IRCT20190315043062N1; Approval Date: 06/09/2019). This study was performed under the ethical standards as laid down in the Declaration of Helsinki and its later amendments or comparable ethical standards. Written informed consent was obtained from all individual participants included in the study. For illiterate participants, informed consent was obtained from their literate legally authorized representatives/guardians.