1. From the Royal Brompton and Harefield NHS Foundation Trust, Harefield Hospital, Middlesex, United Kingdom (M.B.I., A. Arujuna, C.I., M.D.); UCL Hospitals NHS Foundation Trust, Heart Hospital, London, United Kingdom (T.C., P. Meier); Kings College Hospital, King’s College Hospital NHS Foundation Trust, London, United Kingdom (S.K., P. MacCarthy); Barts Health NHS Trust, The London Chest Hospital, London, United Kingdom (A. Archbold, C.K., A.M., D.B., K.R., A.W.); St. George’s Healthcare NHS...