1. “US obesity trends, 1985-2003,” Centers for Disease Control and Prevention http://www.cdc.gov/nccdphp/dnpa/obesity/trend/maps
2. “Weight and waist measurement tool for adults,” National Institute of Diabetes & Digestive & Kidney Diseases http://www.niddK.nih.gov/health/nutrit/pubs/weightandwaist/waistmeasure.htm
3. “Prevalence of overweight and obesity among adults: United States, 1999-2000,” National Center for Health Statistics http://www.cdc.gov/nchs/products/pubs/pubd/hestats/obese/obse99.htm
4. “Obesity-A global epidemic,” American Obesity Association (2004) http://www.obesity.org/subs/fastfacts/obesity_global_epidemic.shtml
5. “Obesity and the environment. Where do we go from here?”;Hill;Science,Feb 7, 2003