Article History
Received: 27 September 2018
Accepted: 3 January 2019
First Online: 16 January 2019
Compliance with ethical standards
:
: The authors have no financial disclosures or other conflicts of interest to disclose.
: There was no direct experimentation on either human or animal subjects represented in this study.
: As this study involved a retrospective analysis of de-identified patient data from a standardized database, it was exempted from informed consent by the OHSU IRB.