Text and Data Mining valid from 2019-08-24
Received: 4 June 2019
Accepted: 3 August 2019
First Online: 24 August 2019
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.
: The University of Pittsburgh Institutional Review Board approved this project as an analysis of de-identified data and therefore not human subjects research.
: This was a secondary data analysis of a de-identified data set so did not require consent.