1. Division of Cancer Control and Population Sciences, National Cancer Institute, Bethesda, Maryland
2. National Center for Health Statistics, Centers for Disease Control and Prevention, Hyattsville, Maryland
3. Harbin Institute of Technology, Shenzhen, Guangdong, China
4. Division of Population Health, Centers for Disease Control and Prevention, Atlanta, Georgia
5. Department of Biostatistics and Institute for Social Research, University of Michigan, Ann Arbor, Michigan
6. National Center for Health Statistics (retired), Centers for Disease Control and Prevention, Hyattsville, Maryland
7. Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania