1. Department of Cardiology, University of Pittsburgh, Pittsburgh, Pennsylvania.
2. Department of Epidemiology and Biostatistics, College of Human Medicine, Michigan State University, East Lansing, Michigan.
3. Department of General Internal Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.
4. Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania.
5. Clinical and Translational Science Institute, University of Pittsburgh, Pittsburgh, Pennsylvania.
6. Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania.