1. Old Testament, Book of Daniel; chapter 1, verses 12–15; describes a planned experiment with both baseline and follow-up observations of two groups who either ate, or did not eat, “the King's meat” over a trial period of ten days.
2. Clinical trial of patulin in the common cold,2004
3. Lessons from 60 years of pharmaceutical innovation;B. Munos,2009
4. Trends in the globalization of clinical trials;F.A. Thiers,2008
5. Brooks, K., Pharma C. CRO Outlook & Opportunities: e-clinical solutions fuel advances. Available at http://www.contractpharma.com/issues/2012-06/view_features/cro-outlook-opportunities/. Accessed on November 10, 2014.