1. Lancashire Cardiac Center, Blackpool Victoria Hospital, Blackpool, UK
2. Ain Shams Medical School, Ain Shams University, Cairo, Egypt
3. Banner University Medical Center, UA College of Medicine, Phoenix, AZ, USA
4. Norfolk and Norwich University Hospital and Norwich Medical School, University of East Anglia, Norwich, UK
5. Cardiology Department, Airedale NHS Foundation Trust, Airedale, UK