The common strategy of evergreening using patents and other exclusivity periods likely contributes to the total incentives that justify a pharmaceutical company's investment in a new drug.
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The author would like to thank B. Roin and P. Hutt for their review of and suggestions for this manuscript.
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Gaudry, K. Evergreening: a common practice to protect new drugs. Nat Biotechnol 29, 876–878 (2011). https://doi.org/10.1038/nbt.1993
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DOI: https://doi.org/10.1038/nbt.1993
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