National Institutes of Health www.nih.gov301-496-4000 National Institute on Aging www.nia.nih.govniaic@nia.nih.gov800-222-2225 National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) www.niddk.nih.govhealthinfo@niddk.nih.gov1-800-860-8747