1. Department of Biology and Center for Cancer Research, Tuskegee University, Tuskegee, AL, USA
2. Laboratory of Comparative Carcinogenesis, Cancer Center of Research, Frederick, MD, USA
3. Department of Biology, McMaster University, Hamilton, ON, Canada
4. Department of Oncologic Research, University Hospital and Clinics, Lafayette General Health, Lafayette, LA, USA
5. Department of Chemical Engineering, Tuskegee University, Tuskegee, AL, USA
6. Department of Genetics, University of Georgia, Athens, GA, USA