Article History
Received: 4 April 2018
Accepted: 7 June 2018
First Online: 2 July 2018
Ethics approval and consent to participate
: IRB approval was obtained before initiation of the study activities. Due to retrospective nature of the study, request for waiver from patient’s consent was approved by IRB. IRB approval letter can be requested from the corresponding author.
: Not applicable.
: The authors declare that they have no competing interests.
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