Funding for this research was provided by:
Research Center for Caries Prevention, Dental Research Institute, Tehran University of Medical Sciences (94-02-194-27561)
Text and Data Mining valid from 2018-05-10
Received: 22 February 2017
Accepted: 24 April 2018
First Online: 10 May 2018
Ethics approval and consent to participate
: The interviewer explained the purposes of the research, voluntary participation, confidentiality of records, and that the participants may stop the interview at any time. The interviewer was unfamiliar with the participants and the quotes were anonymously recorded. Following participant’s approval to be involved in the interviews and focus group sessions, their written consent, to record the interview was also obtained. The Research Ethics Committee of Tehran University of Medical Sciences with the code of IR.TUMS.REC.1394.855 granted ethical approval.
: The authors declare that they have no competing interests.
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