Funding for this research was provided by:
National Institute of Environmental Health Sciences (ES022186, ES028288, ES026684)
Pennsylvania Department of Health (Tobacco CURE)
National Institute of Food and Agriculture (PEN04607, PEN04607)
National Cancer Institute (CA124533)
Article History
Received: 23 January 2019
Accepted: 21 May 2019
First Online: 11 June 2019
Ethics approval and consent to participate
: Not applicable
: Not applicable
: The authors declare that they have no competing interests.