Text and Data Mining valid from 2020-01-07
Received: 30 April 2019
Accepted: 9 December 2019
First Online: 7 January 2020
Compliance with ethical standards
: On behalf of all authors, the corresponding author states that there is no conflict of interest.
: This study was approved by the Institutional Review Board (IRB) at the University of Maryland, Baltimore (HP-00062261).