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PhRMA. (October 23, 2014). Number of unsuccessful brain cancer drugs in development in the United States from 1998 to 2014 [Graph]. In Statista. Retrieved October 25, 2020, from https://www.statista.com/statistics/380961/number-of-unsuccessful-us-brain-cancer-drugs-in-development/
PhRMA. "Number of unsuccessful brain cancer drugs in development in the United States from 1998 to 2014." Chart. October 23, 2014. Statista. Accessed October 25, 2020. https://www.statista.com/statistics/380961/number-of-unsuccessful-us-brain-cancer-drugs-in-development/
PhRMA. (2014). Number of unsuccessful brain cancer drugs in development in the United States from 1998 to 2014. Statista. Statista Inc.. Accessed: October 25, 2020. https://www.statista.com/statistics/380961/number-of-unsuccessful-us-brain-cancer-drugs-in-development/
PhRMA. "Number of Unsuccessful Brain Cancer Drugs in Development in The United States from 1998 to 2014." Statista, Statista Inc., 23 Oct 2014, https://www.statista.com/statistics/380961/number-of-unsuccessful-us-brain-cancer-drugs-in-development/
PhRMA, Number of unsuccessful brain cancer drugs in development in the United States from 1998 to 2014 Statista, https://www.statista.com/statistics/380961/number-of-unsuccessful-us-brain-cancer-drugs-in-development/ (last visited October 25, 2020)
