1. U.S. Department of Health and Human Services. (2008) 2008 Physical Activity Guidelines for Americans. Available: http://www.health.gov/paguidelines/pdf/paguide.pdf. Archived at: http://www.webcitation.org/6FGiGD36h. Accessed 25 June 2009.
2. Tudor-Locke C, Hatano Y, Pangrazi RP, Kang M. (2008) Revisiting “how many steps are enough?”. Med Sci Sports Exerc 40 (7 Suppl):S537–S543.
3. The Look AHEAD study: a description of the lifestyle intervention and the evidence supporting it;TA Wadden;Obesity (Silver Spring),2006
4. A conceptual framework for adaptive preventive interventions;LM Collins;Prev Sci,2004
5. Customizing treatment to the patient: adaptive treatment strategies;SA Murphy;Drug Alcohol Depend,2007