1. Heart Valve Clinic and Echocardiography Laboratory, Barts Heart Centre, St Bartholomew’s Hospital, London, UK; William Harvey Research Institute, Queen Mary University of London, UK
2. Heart Valve Clinic and Echocardiography Laboratory, Barts Heart Centre, St Bartholomew’s Hospital, London, UK; William Harvey Research Institute, Queen Mary University of London, UK; Institute of Cardiovascular Sciences, University College London, London, UK
3. Heart Valve Clinic and Echocardiography Laboratory, Barts Heart Centre, St Bartholomew’s Hospital, London, UK
4. Heart Valve Clinic and Echocardiography Laboratory, Barts Heart Centre, St Bartholomew’s Hospital, London, UK; Institute of Cardiovascular Sciences, University College London, London, UK