Funding for this research was provided by:
Mashhad University of Medical Sciences (980953)
Received: 3 January 2021
Accepted: 27 February 2021
First Online: 9 March 2021
: This study has been assessed by the research council of Mashhad University of Medical Science (Reference number: IR.MUMS.MEDICAL.REC.1398.785). The study was ethically approved because no identifying data are reported. Regarding the patients’ privacy, the point data of patients were randomly moved within a 500 m.
: Not applicable.
: The authors declare that they have no competing interests.