1. Department of Experimental Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
2. Department of Veterinary Medicine and Surgery, University of Texas MD Anderson Cancer Center, Houston, TX, USA
3. Department of Radiation Physics, University of Texas MD Anderson Cancer Center, Houston, TX, USA
4. Department of Obstetrics, Gynecology and Reproductive Sciences, University of Pittsburgh School of Medicine, Magee-Womens Research Institute, Pittsburgh, PA, USA
5. Veterinary Genetics Laboratory, University of California, Davis, CA, USA