Funding for this research was provided by:
Shiraz University of Medical Sciences (grants No. 1396-01-08-15364)
Received: 27 March 2018
Accepted: 13 May 2019
First Online: 11 June 2019
Ethics approval and consent to participate
: The study protocol was approved by the Ethics Committee of Shiraz University of Medical Sciences (SUMS) (IR.SUMS.REC.1396.S828). Because it was a retrospective study which used patients records anonymously, no consent was needed.
: Not applicable.
: The authors declare that they have no competing financial interests.
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