Funding for this research was provided by:
Tobacco-Related Disease Research Program (27IP-0051)
Received: 22 November 2019
Accepted: 9 February 2020
First Online: 19 February 2020
Ethics approval and consent to participate
: This study, including all procedures and consent materials, was approved by the RAND Human Subjects Protection Committee.
: Not applicable.
: The authors declare that they have no competing interests.