1. Division of Cancer Control and Population Sciences, National Cancer Institute, Rockville, Maryland, USA
2. Central Brain Tumor Registry of the United States, Hinsdale, Illinois, USA
3. Department of Population and Quantitative Health Sciences, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
4. Surveillance and Health Services Research, American Cancer Society, Atlanta, Georgia, USA
5. Department of Medicine, Section of Epidemiology and Population Sciences, Dan L. Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, Texas, USA