1. From the Department of Pulmonary and Critical Care Medicine, Newton–Wellesley Hospital, Newton (A.K.), and the Department of Pulmonary and Critical Care Medicine, Tufts Medical School (A.K.), the Departments of Pulmonary and Critical Care Medicine (V.S.S.), Radiology (D.P.M.), Medicine (P.S.L., G.P.), Neurology (Y.A., E.C.C.), and Pathology (K.V.), Massachusetts General Hospital, the Departments of Pulmonary and Critical Care Medicine (V.S.S.), Radiology (D.P.M.), Medicine (P.S.L., G.P.), Neurology (Y.A....