1. Women's Cancers Section, Laboratory of Molecular Pharmacology, Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA
2. Department of Pharmaceutical Sciences, Texas Tech University Health Science Center, Amarillo, TX 79106, USA
3. Department of Medical Biophysics, University of Western Ontario, and London Regional Cancer Program, London, Ont., Canada
4. Brain Tumor Institute, Cleveland Clinic Foundation, Cleveland, OH, USA