1. Rotterdam Thyroid Center (S.R.K., L.C., R.P.P.), Erasmus University Medical Center, 3015 GE, Rotterdam, The Netherlands
2. Department of Epidemiology (S.R.K., L.C., R.R., A.H., A.D., O.H.F., B.H.C.S., R.P.P.), Erasmus University Medical Center, 3015 GE, Rotterdam, The Netherlands
3. Department of Internal Medicine (L.C., R.P.P.), Erasmus University Medical Center, 3015 GE, Rotterdam, The Netherlands
4. Department of Pulmonology (J.G.J.V.A.), Erasmus University Medical Center, 3015 GE, Rotterdam, The Netherlands;
5. Department of Epidemiology (A.H.), Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115