1. Biostatistics, Louisiana State University Health Sciences Center, New Orleans, LA, USA
2. Mathematical Statistician, Division of Cancer Control and Population Sciences, National Cancer Institute, Rockville, MD, USA
3. Information Management Services, Inc, Rockville, MD, USA
4. Epidemiology, Louisiana Tumor Registry, New Orleans, LA, USA
5. Department of Epidemiology and Biostatistics, UCSF, San Francisco, CA, USA
6. Department of Experimental Statistics, Louisiana State University, Baton Rouge, LA, USA