Ethical considerations
This study has the approval of the Ethics Committee of Rafsanjan University of Medical Sciences, Rafsanjan, Iran (code: IR.RUMS.REC.1397.174) and was registered in the Iranian Registry of Clinical Trials (code: IRCT20131228015965N18). Permissions for conducting the study were obtained from the authorities of the above-mentioned university and provided to the authorities of the study setting. The study aim was explained for all participants and informed consent was obtained from them. They were also informed about the confidentiality of their data and the voluntariness of participation. The study intervention was implemented by an experienced nurse in the study setting. Finally, study findings were provided to the authorities of the study setting.