Preliminary evidence on cigarette nicotine reduction with concurrent access to an e-cigarette: Manipulating cigarette nicotine content, e-liquid nicotine content, and e-liquid flavor availability

Cassidy M. White, Katelyn Tessier, Joseph S. Koopmeiners, Rachel Denlinger-Apte, Caroline O. Cobb, Tonya Lane, Claudia L. Campos, John G. Spangler, Dorothy K. Hatsukami, Andrew A. Strasser, Eric C. Donny