Ethics approval and consent to participate
The study has been performed in full accordance with the Declaration of Helsinki and was approved of the ethics committee of School of Nursing And Midwifery - Mashhad University of Medical Sciences, code of ethics (IR.MUMS.NURSE.REC.1398.062). The researcher explained the purpose of the study and the method of work to the participants. After signing the informed consent form, they were told that it was possible for them to withdraw from participating in the study at any stage of the research. Participants were assured regarding the confidentiality of the data and videos collected.