1. From the Division of Pulmonary and Critical Care Medicine, University of Michigan, Ann Arbor (K.R.F.); the National Institute for Health Research Respiratory Biomedical Research Unit, Royal Brompton and Harefield NHS Foundation Trust (A.U.W.), the National Heart and Lung Institute, Imperial College (A.U.W., A.D., S.L.F.W.), and the Department of Radiology, Royal Brompton and Harefield NHS Foundation Trust (A.D.) — all in London; the National Reference Center for Rare Pulmonary Diseases, Louis Pradel...