American College of Physicians/American Society of Internal Medicine (ACP/ASIM)
Phone: 1-800-338-2746

American Medical Association (AMA)
Phone: 1-800-621-8335

Centers for Disease Control and Prevention (CDC)
Phone: 1-800-311-3435

National Health Information Center (NHIC)
Phone: 1-800-336-4797

National Institutes of Health (NIH)
Phone: 301-496-4000

Office of Disease Prevention and Health Promotion
Phone: 202-205-8611

U.S. Department of Health and Human Services
Phone: 877-696-6775

World Health Organization (WHO)