1. Two decades of orphan product development;Haffner;Nature Reviews Drug Discovery,2002
2. Orphan drug policies: implications for the United States. Canada and developing countries;Cheung;Health Law Journal,2004
3. Clinical research for rare disease: opportunities, challenges and solutions;Griggs;Molecular Genetics and Metabolism,2009
4. Development of orphan vaccines: an industry perspective;Lang;Emerging Infectious Diseases,1999
5. The Orphan Drug Act. Implementation and Impact. United States Department of Health and Human Services. Office of Inspector General; May 2001. http://oig.hhs.gov/oei/o.asp#orphan_drug.