Answers about diagnostic tests, how to prepare for them, and any risks involved.
Medline Plus (Español)
Its "Health Topics" feature gathers many kinds of information on one page; also offers a medical encyclopedia, drug information and interactive tutorials.
THE authoritative source for cutting-edge medical research. Provides access to over 12 million MEDLINE citations back to the mid-1960's.
NY Online Access to Health
Excellent collection of online resources, organized by body part, system, and wellness issues. Look under "Groups" for support groups.