1. From the Unit of Academic Radiology, Department of Infection, Immunity and Cardiovascular Disease, C Floor, Royal Hallamshire Hospital, University of Sheffield, Glossop Rd, Sheffield S10 2JF, England (F.C.H., H.M., G.J.C., J.P., J.M.W.); Novartis, Basel, Switzerland (R.K.); Department of Respiratory Medicine, Glenfield Hospital, Leicester, England (S.S., C.E.B.); Insigneo Institute of In-Silico Medicine, University of Sheffield, Sheffield, England (J.M.W.).