Mannes, Z. L., Dunne, E. M., Ferguson, E. G., Cottler, L. B., & Ennis, N. (2020). History of Opioid Use as a Risk Factor for Current Use and Mental Health Consequences among Retired National Football League Athletes: A 9-Year Follow-up Investigation. Drug Alcohol Depend.

Mannes, Zachary L., Eugene M. Dunne, Erin G. Ferguson, Linda B. Cottler, and Nicole Ennis. "History of Opioid Use As a Risk Factor for Current Use and Mental Health Consequences Among Retired National Football League Athletes: A 9-Year Follow-up Investigation." Drug Alcohol Depend 2020.

Mannes, Zachary L., et al. "History of Opioid Use As a Risk Factor for Current Use and Mental Health Consequences Among Retired National Football League Athletes: A 9-Year Follow-up Investigation." Drug Alcohol Depend 2020.