Fred Hutchinson Cancer Research Center: The world's premier bone marrow transplant center, there is also other oncology related information
Mayo Clinic: A national referral medical center. Also has a large medical internet site.
M. D. Anderson: A large oncology referral center in the heart of Texas.
National Jewish Medical Center: A national referral center for pulmonary & immunologic diseases, there is an large web site with various information on a wide number of common & rare diseases. See information sheets on MAI Pulmonary Disease, asthma, vocal cord dysfunction syndrome, tuberculosis, pulmonary fibrosis & a variety of interstitial lung diseases just for starters.
OHSU: University of Oregon's medical school located in Portland
Stanford Medical Center: Links to Stanford's medical centers, libraries, and campuses.
UCSF Medical Center: Links to the University of California - San Francisco's medical centers, libraries, and campuses.
University of Washington Medical Center: Healthlinks is maintained by the U of W and is a useful way to access medical information
Virginia Mason Medical Center: VMCA is a referral hospital in Seattle, WA
The Virtual Hospital: A true smorgasbord of CME courses, disease info, web links, etc... run by the University of Iowa.