1. Departments of Preventive Medicine (R.K., W.J.M., H.N.H., F.Z.S.), Keck School of Medicine, University of Southern California, Los Angeles, California 90033
2. Department of Pediatrics (R.K.), Keck School of Medicine, University of Southern California, Los Angeles, California 90033
3. Department of Medicine (H.N.H.), Keck School of Medicine, University of Southern California, Los Angeles, California 90033
4. Atherosclerosis Research Unit, and Departments of Obstetrics and Gynecology (F.Z.S.), Keck School of Medicine, University of Southern California, Los Angeles, California 90033
5. Department of Obstetrics and Gynecology (R.A.L.), Columbia University Medical Center, New York, New York 10032