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2. The Pharmaceutical Research and Manufacturers of America. Disponible en: http://www.phrma.org/.
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4. The New York Review of Books; July 15, 2004. Disponible en: http://www.nybooks.com/articles/archives/2004/jul/15/the-truth-about-the-drug-companies/.
5. Drug development needs private industry;Zycher;The Wall Street Journal,2008