Text and Data Mining valid from 2019-08-13
Received: 3 January 2019
Accepted: 30 July 2019
First Online: 13 August 2019
Ethics approval and consent to participate
: The Institutional Review Board (IRB) at the University of Texas Medical Branch, Galveston, TX, approved the study. The need for written consent was waived by the IRB.
: Not applicable.
: The authors declare that they have no competing interests.