Funding for this research was provided by:
National Heart Lungh and Blood Institute (HL131531)
Text and Data Mining valid from 2020-01-14
Received: 17 October 2019
Accepted: 22 December 2019
First Online: 14 January 2020
Ethics approval and consent to participate
: This study was approved by the Human Subjects Protection Committee at RAND Corporation and the University of Pittsburgh IRB. All participants signed a consent form.
: The authors declare that they have no competing interests.