REFERENCE
Taylor L.Five drug classes account for over 60% of US Rx spending, says govt. Pharma Times: [2 pages], 11 Feb 2009. Available from: URL: http://www.pharmatimes.com
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Nearly two thirds of prescription drug expenditure in the US was spent in five drug classes. Pharmacoecon. Outcomes News 572, 11 (2009). https://doi.org/10.2165/00151234-200905720-00025
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DOI: https://doi.org/10.2165/00151234-200905720-00025