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2. Spencer, J.A. and van Zwanenberg, T.D. Prescribing research: PACT to the future. J R Coll Gen Pract 1989, 39: 270–272.
3. Department of Health. Improving prescribing. The implementation of the GP indicative prescribing scheme. London: Department of Health, 1990.
4. Prescription Pricing Authority. Statistical data relating to prescriptions dispensed by chemists, contractors and dispensing doctors for 1987. Forms PD1 and FP51. London: Department of Health, 1987.
5. Office of Population Censuses and Surveys. Key population and vital statistics. England and Wales for 1987. Series VS No. 14/PPI No. 10. London: HMSO, 1989.