1. 1Department of Chronic Disease Epidemiology, Yale School of Public Health, New Haven, Connecticut.
2. 2Department of Surgery, Hospital of the University of Pennsylvania, University of Pennsylvania Health System, Philadelphia, Pennsylvania.
3. 3Yale Cancer Center, New Haven, Connecticut.
4. 4School of Public Health, University of Illinois Chicago and Cancer Center University of Illinois Chicago., Chicago, Illinois.
5. 5Department of Biostatistics, Yale School of Public Health, New Haven, Connecticut.