1. Department of Radiation Oncology, Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL
2. Department of Obstetrics & Gynecology, Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL
3. Department of Medicine, Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL
4. Bristol-Myers Squibb Company, Wallington, CT
5. Department of Pathology, Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL
6. National Cancer Institute, Bethesda, MD