Footnotes

• AA and RV are joint first authors.

• Contributors All authors equally contributed to the study design, acquisition of data and writing the paper. AA was also responsible for the study analysis. RV and MRA were responsible for the critical revision of the manuscript for important intellectual content. MRA was involved in the study supervision.

• Funding This research was funded by the Mashhad University of Medical Sciences.

• Competing interests None declared.

• Patient consent Obtained.

• Ethics approval Mashhad University of Medical Sciences.

• Provenance and peer review Not commissioned; internally peer reviewed.