Text and Data Mining valid from 2019-06-20
Received: 28 January 2019
Accepted: 6 June 2019
First Online: 20 June 2019
Ethics approval and consent to participate
: This retrospective study was approved by the Institutional Review Board of the University of Texas MD Anderson Cancer Center on February 21, 2017, (IRB # PA 16-0160). A waiver of informed consent was granted.
: Not applicable
: The authors declare that they have no competing interests.