Affiliation: | Current affiliations: Divisions of Pulmonary Medicine (J.T.A., K.F.R.) and Clinical Epidemiology (O.M.D.), Leiden University Medical Center, Leiden, Biometrics Department (R.B., H.v.T.), Pulmonary Medicine (S.B.), Gastero-enterology (M.S., B.T.), Netherlands Cancer Institute Amsterdam, Pulmonary Medicine Medical Center, Leeuwarden (B.V., H.N.), Pulmonary Medicine, St. Catherine's Hospital Eindhoven (B.v.d.B., R.v.B.), Pulmonary Medicine, Medical Center Alkmaar (T.H., A.W.), Pulmonary Medicine, Meander Medical Center Amersfoort (G.S.), The Netherlands |