1. Klinikum Ludwigshafen, Ludwigshafen, Germany
2. Institute of Cardiovascular Sciences, Birmingham, United Kingdom
3. Hopital Europeen Georges Pompidou- University Paris Descartes, Paris, France
4. St. Anne University Hospital Brno (FNUSA), Brno, Czechia
5. University of Leeds, Leeds, United Kingdom
6. Maria Cecilia Hospital, Cotignola, Italy
7. Rudolfstiftung Hospital, Vienna, Austria