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.