Owens, D. K., K. N. Lohr, D. Atkins, J. R. Treadwell, J. T. Reston, E. B. Bass, S. Chang, and M. Helfand. 2010. AHRQ series paper 5: Grading the strength of a body of evidence when comparing medical interventions-agency for healthcare research and quality and the effective health-care program. Journal of Clinical Epidemiology 63(5):513-523.
Pocock, S. J. 1996. The role of external evidence in data monitoring of a clinical trial. Statistics in Medicine 15(12):1285-1293.
Temple, R., and S. S. Ellenberg. 2000. Placebo-controlled trials and active-control trials in the evaluation of new treatments. Part 1: Ethical and scientific issues. Annals of Internal Medicine 133(6):455-463.
Vandenbroucke, J. P., and B. M. Psaty. 2008. Benefits and risks of drug treatments: How to combine the best evidence on benefits with the best data about adverse effects. JAMA 300(20):2417-2419.
Wittes, J., E. Barrett-Connor, E. Braunwald, M. Chesney, H. J. Cohen, D. Demets, L. Dunn, J. Dwyer, R. P. Heaney, V. Vogel, L. Walters, and S. Yusuf. 2007. Monitoring the randomized trials of the Women’s Health Initiative: The experience of the Data and Safety Monitoring Board. Clinical Trials 4(3):218-234.