Declarations
Conflict of interest: We declare there is no conflict of interest related to this study and there was no financial support that influence its outcome.
Ethics approval: The study is in compliance with the regulations of Iran and approved by an independent ethics committee of Mashhad University of Medical Sciences, Mashhad, Iran (ethics committee reference number and approval date: IR.MUMS.REC.1394.705, 2016-02-27).
Consent to participate: Details and procedures of the study were completely explained to patients through an interview, consent to participate was obtained before the start of study treatment.
Availability of data and material: The data that support the findings of this study are available on request from the corresponding author.