Memorial Sloan-Kettering Cancer Center, New
York (Dr Richard Gewanter).
John Hopkins Hospital, Baltimore, Maryland.
Dana-Farber Cancer Institute, Boston.
Mayo Clinic, Rochester.
UCLA Medical Center, Los Angeles.
University of Chicago Hospitals, Chicago.
Stanford University Hospital, Stanford, California.
Duke University Medical Center, Durham.
University of Washington Medical Center, Seattle, Washington.
Smilow Cancer Center, New Haven, CT.