1. Department of Biostatistics, Yale School of Public Health, New Haven, CT 06510, USA
2. Department of Biostatistics, University of Nebraska Medical Center (UNMC), Omaha, NE 68198, USA
3. Department of Chronic Disease Epidemiology, Yale School of Public Health, New Haven, CT 06510, USA
4. Yale Cancer Outcomes, Public Policy and Effectiveness Research (COPPER) Center, New Haven, CT 06520, USA