1. Center for Translational Epidemiology and Comparative Effectiveness Research and Department of Community Health SciencesBoston University School of Medicine and Public Health Boston Massachusetts
2. Department of CardiologyUniversity of Massachusetts Medical School Worcester Massachusetts
3. Department of CardiologyUniversity of California Irvine School of Medicine Irvine California
4. Division of Preventive Medicine and Epidemiology and Cardiovascular Medicine, Department of MedicineBoston University Medical School Boston Massachusetts