Text and Data Mining valid from 2020-02-03
Received: 19 June 2018
Accepted: 26 January 2020
First Online: 3 February 2020
Ethics approval and consent to participate
: This study is approved by Shiraz University of Medical Sciences ethics committee with the ID number of IR.SUMS.REC.1396.S639.
: There was no difficulty in publishing the results. All the included databases and materials are available for public use.
: The authors declare that they have no competing interests.