1. Department of Epidemiology (M.R.S., H.Z.), School of Public Health, University of Michigan, Ann Arbor, Michigan 48109;
2. Geffen School of Medicine at UCLA (G.A.G.), Los Angeles, California 90095;
3. Endocrine Unit (J.S.F., R.M.N.), Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts 02114;
4. Department of Epidemiology (J.A.C.), Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania 15261;
5. Alere International (J.E.), Cranfield, United Kingdom;
6. SPD Development Company Ltd (S.J.), Bedford, United Kingdom