Ethics approval and consent to participate
Ethical approval was obtained for this study from the Research Ethic Committee (REC) of Yasuj University of Medical Sciences (YUMS), Yasuj, Iran with ID code: IR.YUMS.REC.1398.152. The informed consent was obtained from the patients to participate in this study. The questionnaires were anonymous and all the information was kept confidential. Furthermore, the patients were allowed to withdraw at any stage, and no costs were incurred to the patients, hospitals, and insurance companies. All methods were performed based on the relevant guidelines and regulations in accordance with the Declaration of Helsinki 1994.