In the biopharma space, finding potential new uses for shelved drugs has become a business model unto itself, with proponents touting successes such as AZT – a drug that bombed in cancer trials only to return two decades later as the first approved therapy for HIV – and the National Institutes of Health even endorsing the strategy, setting up the National Center for Advancing Translational Sciences as a matchmaker to hook up researchers with failed compounds in 2012.