1. Departments of Medicine (M.S.B., R.E.W., S.R.), The University of Chicago, Chicago, Illinois 60637
2. Health Studies (M.K.), The University of Chicago, Chicago, Illinois 60637
3. Endocrinology Unit (J.A.), Hospital Divino Espírito Santo, 9500 Ponta Delgada, Azores-Portugal
4. Pediatrics (R.E.W., S.R.), The University of Chicago, Chicago, Illinois 60637
5. Committee on Genetics (S.R.), The University of Chicago, Chicago, Illinois 60637