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Handling editor Anna Maria Geretti
Contributors RJ contributed to the design and analysis, and participated in most of the steps of the study. FGB conducted interviews and analysis, and prepared the manuscript. AJ assisted in designing the study and helped in the interpretation of the study. All authors have read and approved the content of the manuscript.
Funding This study is funded by Kermanshah University of Medical Sciences (grand number: 95126).
Competing interests None declared.
Patient consent for publication Not required.
Ethics approval This study was approved by the Ethics Committee of Kermanshah University of Medical Sciences (KUMS.REC.1395.123).
Provenance and peer review Not commissioned; internally peer reviewed.
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