Agency for Health Care Policy and Research ( http://www.ahcpr.gov )

Alzheimer's Association ( http://www.alz.org )

American Academy of Dermatology ( http://www.aad.org )

American Academy of Family Physicians ( http://www.aafp.org )

American Academy of Pediatrics ( http://www.aap.org )

American Autoimmune Related Diseases Association ( http://www.aarda.org )

American Cancer Society ( http://www.cancer.org )

American Diabetes Association ( http://www.diabetes.org )

American Heart Association ( http://www.americanheart.org/ )

American Psychiatric Association ( http://www.psych.org/ )

American Red Cross ( http://www.givebloodtoday.org )

Arthritis Foundation ( http://www.arthritis.org )

Association of Cancer Online Resources ( http://www.acor.org )

Cancer Guide ( http://cancerguide.org/ )

Centers for Disease Control and Prevention ( http://www.cdc.gov )

Combined Health Information Database ( http://chid.aerie.com/index.htm l )

Dr. Koop.com ( http://www.drkoop.com )

Food & Drug Administration (FDA) ( http://www.fda.gov )

Health on the Net Foundation ( http://www.hon.ch )

Healthanswers.com ( http://www.healthanswers.com )

Healthfinder ( http://www.healthfinder.gov )

Intelihealth ( http://www.intelihealth.com )

Johns Hopkins University Medicine ( http://hopkins.med.jhu.edu )

KidsMeds ( http://www.kidsmeds.com )

Mayo Clinic ( http://www.mayoclinic.com )

Medline Plus Database ( http://www.nlm.nih.gov/medlineplus )

Medscape ( http://www.medscape.com )

Mental Help Net ( http://www.mentalhelp.net )

National Cancer Institute ( http://www.nci.nih.gov )

National Institute of Arthritis and Musculoskeletal and Skin Disease ( http://www.nih.gov/niams )

National Institute of Diabetes and Digestive and Kidney Disease ( http://www.niddk.nih.gov )

National Institute of Mental Health ( http://www.nimh.nih.gov/ )

National Institutes for Health ( http://www.nih.gov )

National Multiple Sclerosis Society ( http://www.nmss.org )

NetWellness ( http://netwellness.org )