1. From the Adult CF Unit (T.S.F., D.S.N., M.J.W.) and Department of Radiology (C.M.), Liverpool Heart and Chest Hospital, Thomas Drive, Liverpool L14 3PE, UK; Institute of Life Course and Medical Sciences (T.S.F., P.S.M.) and Institute of Infection and Global Health (D.S.N., M.J.W.), University of Liverpool, Liverpool, UK; and Institute in the Park (University of Liverpool), Alder Hey Children’s Hospital, Liverpool, UK (P.S.M.).