1. St. James's University Hospital, Leeds, UK
2. Kliniken Essen-Mitte, Essen, Germany
3. Nouvel Hopital Civil, Strasbourg, France
4. Rigshospitalet, University of Copenhagen, Denmark
5. Salamanca University Hospital, Salamanca, Spain
6. Universitatsspital, Thoraxchirurgie, Basel, Switzerland
7. San Gerardo Hospital Monza, Monza, Italy
8. IRCCS Sacro Cuore-Don Calabria Hospital, Negrar, Verona, Italy
9. Triducive Partners Limited, Kent, UK