1. Agency Medical Directors Group. (2010). Interagency guideline on opioid dosing for chronic non-cancer pain: An educational aid to improve care and safety with opioid therapy. 2010 update [cited 12 Jan 2012]. Available from
http://www.agencymeddirectors.wa.gov/Files/OpioidGdline.pdf
2. Ajzen, I. (1985). From intentions to actions: A theory of planned behavior. In J. Kuhland & J. Beckman (Eds.), Action-control: From cognitions to behavior (pp. 11–39). Heidelberg, Germany: Springer.
3. Ajzen, I. (1991). The theory of planned behavior. Organizational Behavior and Human Decision Processes, 50, 179–211.
4. Ajzen, I., & Fishbein, M. (1980). Understanding attitudes and predicting social behavior. Englewood Cliffs, NJ: Prentice-Hall.
5. American Psychological Association. Stress in America 2009. 2009 [cited 10 Feb 2012]. Available from
http://www.apa.org/news/press/releases/stress-exec-summary.pdf
.