1. Innovation in the pharmaceutical industry: new estimates of R&D costs;DiMasi;J Health Econ,2016
2. Why Many Generic Drugs Are Becoming so Expensive;Sarpatwari,2015
3. Brand-name Prescription Drug Pricing: Lack of Therapeutically Equivalent Drugs and Limited Competition May Contribute to Extraordinary Price Increases;GAO,2009
4. Drug Goes from $13.50 a Tablet to $750, Overnight;Pollack,2015
5. How Pfizer Set the Cost of its New Drug at $9,850 a Month;Rockoff,2015