1. Department of Obstetrics, Gynecology, and Reproductive Sciences, School of Medicine, School of Medicine, University of Pittsburgh, Magee-Womens Research Institute, Pittsburgh PA (J.M.C., R.E.G., J.B., A.H., C.A.H.).
2. Department of Epidemiology, Graduate School of Public Health (J.M.C.), University of Pittsburgh, PA.
3. Cardiology Division, Department of Medicine, University of Pittsburgh School of Medicine, PA (M.F.M.).
4. Graduate School of Public Health (M.T., G.T.), University of Pittsburgh, PA.
5. School of Nursing (M.S.), University of Pittsburgh, PA.
6. Department of Laboratory Medicine and Pathobiology, University of Toronto, Canada (W.T.P.).