1. Department of Chronic Disease Epidemiology, Yale School of Public Health, Yale University , 60 College Street, New Haven, CT 06510 , USA
2. Department of Public Health, University of Tennessee , 1914 Andy Holt Ave, Knoxville, TN 37996 , USA
3. Center for Outcomes Research and Evaluation, Yale School of Medicine , 195 Church St., 5th Floor, New Haven, CT 06510 , USA
4. Section of Cardiovascular Medicine, Department of Internal Medicine, Yale School of Medicine , 333 Cedar St, New Haven, CT 06510 , USA
5. Department of Biostatistics, Yale School of Public Health , 60 College Street, New Haven, CT 06510 , USA
6. Department of Emergency Medicine, Yale School of Medicine , 333 Cedar St, New Haven, CT 06510 , USA
7. Harvey Cushing/John Hay Whitney Medical Library, Yale University , 333 Cedar St, New Haven, CT 06510 , USA
8. Department of Environmental Health Sciences, Yale School of Public Health , 60 College Street, New Haven, CT 06510 , USA