Text and Data Mining valid from 2018-06-07
First Online: 7 June 2018
Compliance with Ethical Standards
: The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
: This study was confirmed by the Ethics Committee of Mazandaran University of Medical Sciences (Ref: IR.MAZUMS.REC.95.S.110). Patients were informed about the study objectives and procedures. Moreover, they ensured that participation was voluntary and it would not affect the course of their treatment. The confidentiality of patients’ information was guaranteed. Written informed consent was obtained from all participants.