Funding for this research was provided by:
John Merck Fund (N/A)
David and Lucile Packard Foundation (N/A)
Kaiser Permanente (N/A)
The ClimateWorks Foundation (N/A)
Received: 19 March 2019
Accepted: 25 July 2019
First Online: 28 August 2019
Ethics approval and consent to participate
: All study protocols were approved by the George Mason University Institutional Review Board (IRBNet reference number: #1166102–1). Written electronic informed consent was obtained from all study participants.
: Not applicable.
: The authors declare that they have no competing interests.