1. Department of Breast and Gynecologic Medical Oncology, The University of Texas M. D. Anderson Cancer Center, Houston, TX 77030
2. Current address: Department of Breast and Gynecologic Medical Oncology, Box 56, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030-4009
3. Department of Thoracic/Head and Neck Medical Oncology, The University of Texas M. D. Anderson Cancer Center, Houston, TX 77030
4. Department of Gastrointestinal Medical Oncology, The University of Texas M. D. Anderson Cancer Center, Houston, TX 77030