1. National Cancer Institute, Bethesda; SAIC-Frederick, Frederick National Laboratory for Cancer Research, Frederick; The EMMES Corporation, Rockville, MD; St Joseph Hospital of Orange, Orange, CA; Billings Clinic Cancer Center, Billings, MT; Gundersen Health System, La Crosse; Waukesha Memorial Hospital (ProHealth Care), Waukesha, WI; The Cancer Program of Our Lady of the Lake and Mary Bird Perkins Cancer Center, Baton Rouge, LA; Delaware Cancer Consortium, Dover; Helen F. Graham Cancer Center, Newark, DE