Received: 10 December 2018
Accepted: 26 June 2019
First Online: 18 July 2019
Ethics approval and consent to participate
: Ethical approval to conduct the study was granted by the Medical Ethics Committee, Shiraz branch, Islamic Azad university, Iran (No: 16310201962002). Informed consents were obtained from all study participants included in the study. Participation was on a voluntary basis and no remuneration was involved.
: Not applicable.
: The authors declare that they have no competing interests.