1. Department of Cancer Prevention and Control, Roswell Park Cancer Institute, Buffalo, NY;
2. Southwest Oncology Group Statistical Center, Fred Hutchinson Cancer Research Center, Seattle, WA;
3. Southern Illinois University School of Medicine, Springfield, IL;
4. Katmai Oncology Group, Anchorage, AK;
5. University of Texas M. D. Anderson Cancer Center, Houston, TX;
6. University of New Mexico, Albuquerque, NM;
7. Department of Cytogenetics, City of Hope National Medical Center, Duarte, CA