Medline Plus A service of U.S. National Library of Medicine and the National Institutes of Health.
Mayo Clinic Medical and health information from the Mayo Clinic.
National Cancer Institute U.S. National Institutes of Health sponsors this site.
Kids Health This site is sponsored by health experts of Nemours – a nonprofit organization devoted to children’s health.
NIH Senior Health Provides basic health and wellness information for older adults from National Institutes of Health.
Medicare The official U.S. Government site for people with Medicare.