1. L’Hotel-Dieu de Québec, Centre Hospitalier Universitaire de Québec, Québec, Province de Québec, Canada
2. University of Texas M. D. Anderson Cancer Center, Houston, Texas
3. Thomas Jefferson Medical Center, Philadelphia, Pennsylvania
4. Baylor College of Medicine, Houston, Texas
5. Vanderbilt University Medical Center, Nashville, Tennessee
6. Duke University Medical Center, North Carolina
7. Mount Sinai Medical Center, New York, New York on behalf of the PC B302/01 Study Group