1. Department of Population Health and Reproduction (S.M., F.M.M., A.J.C.), University of California, Davis, California 95616
2. California Regional Primate Research Center (A.F.T.), University of California, Davis, California 95616
3. Department of Pediatrics (A.F.T.), University of California, Davis, California 95616
4. Department of Obstetrics and Gynecology University of Alabama (C.R.P.), Birmingham, Alabama 35233
5. Department of Animal Sciences, University of Illinois (J.M.B., L.P.), Urbana, Illinois 61801