Watkins, S. L., Karliner-Li, P., Lee, Y. O., Koester, K. A., & Ling, P. M. (2021). A mixed-methods study to inform the clarity and accuracy of cannabis-use and cannabis-tobacco co-use survey measures. Drug Alcohol Depend.

Watkins, Shannon Lea, Pearl Karliner-Li, Youn Ok Lee, Kimberly A. Koester, et Pamela M. Ling. "A Mixed-methods Study to Inform the Clarity and Accuracy of Cannabis-use and Cannabis-tobacco Co-use Survey Measures." Drug Alcohol Depend 2021.

Watkins, Shannon Lea, et al. "A Mixed-methods Study to Inform the Clarity and Accuracy of Cannabis-use and Cannabis-tobacco Co-use Survey Measures." Drug Alcohol Depend 2021.