1. New drugs cost US$2.6 billion to develop;Mullard;Nat. Rev. Drug Discov.,2014
2. Poredda , A. 2016 Patent challenges in the pharmaceutical field
3. IMS Institute for healthcare Informatics: Comparison of Hepatitis C Treatment Costs
4. Nelson , R. 2016 Two Generic Versions of Imatinib Launched - But Will Prices Drop?