6. Ethical Consideration
The examination of the research ethics review committee of J University preceded the research (IRB No: JJNU_IRB-20150115-HR-001-01). Prior to the recording, research objects were asked about willingness of research participation and informed of the option of withdrawal, anonymity, privacy, necessity of recording, and storage and disposal methods of recording files and manuscripts. They filled in and signed on the written form of agreement. Voluntary participation was a prerequisite and the questionnaire was not distributed to those who did not agree with it. They were informed that there would be no disadvantage if they chose not to participate. Private information in the collected data was never used for other purposes than the research itself, and participant records were managed with numbers instead of names