Text and Data Mining valid from 2018-04-13
Received: 17 March 2018
Accepted: 19 March 2018
First Online: 13 April 2018
Ethics approval and consent to participate
: All procedures performed in this retrospective study were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The study was also carried out with IRB approval from Houston Methodist Hospital (IRB-(3 N)-0114–0013).
: Not applicable.
: The authors declare that they have no competing interests.
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