1. Juvenile primary fibromyalgia syndrome;Anthony;Curr Rheumatol Rep,2001
2. Centers for Disease Control and Prevention: Physical activity levels among children aged 9-13 years-United States, 2002;Morb Mortal Weekly Rep,2003
3. Centers for Disease Control and Prevention: National Center for Health Statistics, National Health and Nutrition Examination Survey United States, 1995-2005,2005
4. Centers for Disease Control and Prevention: Physical Activity Guidelines For Americans, Division of Nutrition, Physical Activity and Obesity. Available at: http://www.cdc.gov/nccdphp/dnpa/index.htm, National Center for Chronic Disease Prevention and Health Promotion, 2008
5. Centers for Disease Control and Prevention: Youth Risk Behavior Surveillance: United States, 2007;Morb Mortal Weekly Rep,2008