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Viagra and Big Pharma: A Precarious Investment ?

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The history of Viagra, and its developer copyright, presents a complex case study for investors. At first a blockbuster drug, yielding billions in sales , its patent expiration created a flood of https://poppyotuk024616.wikikarts.com/2245260/sildenafil_and_the_pharmaceutical_sector_a_precarious_opportunity

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