1. Hux JE, Naylor CD, Fielding DA. The Ontario Drug Benefit Program copayment: its impact on access for Ontario seniors and charges to the program. Toronto: Institute for Clinical Evaluative Sciences in Ontario; April 24, 1997.
2. The impact of increasing patient prescription drug cost sharing on therapeutic classes of drugs received and on the health status of elderly HMO members;Johnson;Health Service Research,1997
3. The effect of a $2 co-payment on prescription refill rates of Quebec elderly and its relationship to socio-economic status;Poirier;Canadian Pharmaceuticals Journal,1998
4. Are prescribed and over-the-counter medicines economic substitutes? A study of the effects of health insurance on medicine choices by the elderly;Stuart;Medical Care,1995
5. Who bears the burden of Mediaid drug copayment policies?;Stuart;Health Affairs,1999