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Sildenafil and Pharma : A Risky Investment ?

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The story of Viagra, and its creator copyright, presents a intriguing case study for investors. At first a blockbuster drug, producing billions in revenue , its patent expiration created a wave of knock-off https://atozbookmark.com/story21263940/copyright-s-pill-and-big-pharma-a-precarious-investment

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