Text and Data Mining valid from 2018-05-09
Received: 13 June 2017
Accepted: 15 December 2017
First Online: 9 May 2018
Ethics approval and consent to participate
: Approval for this retrospective study was obtained from the Institutional Review Board (STU 032015–088) at the University of Texas Southwestern Medical Center (UTSW) in Dallas, Texas. Patient consent was waived due to the retrospective nature of this study.
: Not applicable.
: The authors declare that they have no competing interests.
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