Ayers, J. W., Leas, E. C., Allem, J., Benton, A., Dredze, M., Althouse, B. M., . . . Unger, J. B. (2017). Why do people use electronic nicotine delivery systems (electronic cigarettes)? A content analysis of Twitter, 2012-2015. PLoS One.

Ayers, John W., Eric C. Leas, Jon-Patrick Allem, Adrian Benton, Mark Dredze, Benjamin M. Althouse, Tess B. Cruz, and Jennifer B. Unger. "Why Do People Use Electronic Nicotine Delivery Systems (electronic Cigarettes)? A Content Analysis of Twitter, 2012-2015." PLoS One 2017.

Ayers, John W., et al. "Why Do People Use Electronic Nicotine Delivery Systems (electronic Cigarettes)? A Content Analysis of Twitter, 2012-2015." PLoS One 2017.