5. International Committee of Medical Journal Editors. Uniform Requirements for Manuscripts Submitted to Biomedical Journals. Available at: http://www.icmje.org. Accessed July 28, 2008
6.
LastJMSpasoffRAHarrisSSThuriauxMC (eds). A Dictionary of Epidemiology. 4th ed. New York: Oxford University Press; 2001:146
7.
7. Editorial commentary: avoiding biased comparisons. The James Lind Library2007. Available at: http://www.jameslindlibrary.org. Accessed July 28, 2008
8.
9.
10.
11.
LexchinJBeroLADjulbegovicB, et al. Pharmaceutical industry sponsorship and research outcome and quality: systematic reviewBMJ2003326116770
12.
13.
14.
15.
SurowieckiJ.The talking cureThe New Yorker December 9, 2002;38. Available at: http://www.newyorker.com/archive. Accessed July 27, 2008