1. Departments of Pediatrics (B.A.S., A.V.-L., V.P.) University of Michigan, Ann Arbor, Michigan 48109;
2. Department of Obstetrics and Gynecology and Wisconsin National Primate Research Center (D.H.A.), University of Wisconsin, Madison, Wisconsin 53706
3. Internal Medicine (C.F.B.) University of Michigan, Ann Arbor, Michigan 48109;
4. Reproductive Sciences Program (V.P.), University of Michigan, Ann Arbor, Michigan 48109;