1. Yale Child Health Research Center (S.A.R.) Yale University School of Medicine, New Haven, Connecticut 06520;
2. JS Genetics (K.H., S.H.), New Haven, Connecticut 06519
3. Section of Perinatal Medicine (A.W., J.R.G.), Yale University School of Medicine, New Haven, Connecticut 06520;
4. Department of Pediatrics; Departments of Genetics (P.L., J.R.G.) Yale University School of Medicine, New Haven, Connecticut 06520;
5. Department of Laboratory Medicine (H.M.R.); Yale University School of Medicine, New Haven, Connecticut 06520;
6. Investigative Medicine Program (J.R.G.), Yale University School of Medicine, New Haven, Connecticut 06520;