Increasing time costs and copayments for prescription drugs: an analysis of policy changes in a complex environment.
Domino ME, Martin BC, Wiley-Exley E, Richards S, Henson A, Carey TS, Sleath B. Increasing time costs and copayments for prescription drugs: an analysis of policy changes in a complex environment. Health Serv Res. 2011 Jun; 46(3):900-19.