1. From the Departments of Public Health (H.J.K., C.M.A., U.Y.-K., K.H.) and Pulmonology (J.G.J.V.A.), Erasmus MC–University Medical Center Rotterdam, and the Departments of Pulmonology (S.W.) and Pathology (M.A.B.), Maasstad Hospital, Rotterdam, the Departments of Radiology (P.A.J., W.P.M., F.A.A.M.H.) and Pulmonology (J.-W.J.L.), University Medical Center Utrecht, Utrecht, the Departments of Radiology (E.T.S.) and Pulmonology (C.W.), Spaarne Gasthuis, Haarlem, the Department of Radiation Oncology, Leiden...