1. From the Department of Medical Imaging, Radboudumc, Route 767, Room 2.30, Geert Grooteplein Zuid 10, 6525 GA, Nijmegen, the Netherlands (N.A., J.S.B., K.V.V., C.J., M.d.R., J.H., H.H.); Department of Medicine, Section of Pulmonary Medicine, Herlev-Gentofte Hospital, Herlev, Denmark (Z.S.); and Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark (Z.S.).