Affiliation: | ? Leiden University Medical Center, Leiden, the Netherlands;† Department of Cardiovascular Medicine, University of Oxford, Oxford, United Kingdom;‡ Royal Brompton Hospital, London, United Kingdom;§ University Hospitals Leuven (K.U. Leuven), Leuven, Belgium;∥ Athens University Hospital Attikon, Athens, Greece;¶ University and Royal Infirmary of Edinburgh, Edinburgh, United Kingdom;# University of Brescia, Brescia, Italy;?? Hammersmith Hospital, NHLI, Imperial College London, London, United Kingdom;†† Kalmar University, Kalmar, Sweden;‡‡ Medical University of Vienna, Vienna, Austria;§§ Heraklion University Hospital, Crete, Greece;∥∥ Lisbon University Medical School, Lisbon, Portugal;¶¶ University of Ferrara and Salvatore Maugeri Foundation, IRCCS, Ferrara, Italy |