Northeast:

* Beth Israel Deaconess Medical Center, Boston
* Brigham and Women's Hospital, Boston
* Dana-Farber Cancer Institute, Boston
* Dartmouth-Hitchcock Medical Center, Lebanon, N.H.
* Fox Chase Cancer Center, Philadelphia
* Hospital of the University of Pennsylvania, Philadelphia
* Lancaster General Hospital, Lancaster, Pa.
* Lehigh Valley Hospital, Allentown, Pa.
* Massachusetts General Hospital, Boston
* Memorial Sloan-Kettering Cancer Center, New York
* New York-Presbyterian Univ. Hosp. of Columbia and Cornell
* University of Pittsburgh Medical Center
* Johns Hopkins Hospital, Baltimore
* Yale-New Haven Hospital, New Haven, Conn.