Funding for this research was provided by:
Vice-Chancellor for Research, Shiraz University of Medical Sciences (98-01-01-22074)
Received: 9 June 2020
Accepted: 27 August 2020
First Online: 14 September 2020
Ethics approval and consent to participate
: This study was approved by the ethics committee of Shiraz University of Medical Sciences (IR.SUMS.REC.1399.059). There were some problems with literacy, visual acuity and understanding of participation in data gathering, accordingly we talk to everyone in best simple way and then they sign the written informed consent. If the patient was under legal age, has visual impairment or unlettered, the parents or guardians included in explanation session and they sign instead. However, any participant is included only if the consent is existed and the ethical committee are aware of the situation.
: Not Applicable.
: The authors declare that they have no competing interests.