1. http://report.nih.gov/rcdc/categories/
2. http://www.cbo.gov/ftpdocs/88xx/doc8891/12-18-ComparativeEffectiveness.pdf
3. US Food and Drug Administration. http://www.fda.gov/AboutFDA/WhatWeDo/default.htm
4. Code of Federal Regulations. http://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/CFRSearch.cfm?fr=314.125