1. Second Department of Cardiology, Attikon Hospital, National and Kapodistrian University of Athens, Athens, Greece
2. Department of Cardiology, G. Gennimatas General Hospital of Athens, Athens, Greece
3. Cardio Center, Humanitas Clinical and Research Hospital IRCCS, Rozzano-Milan, Italy
4. First Department of Cardiology, Hippokration Hospital, National and Kapodistrian University of Athens, Athens, Greece
5. Athens Medical Center, Athens, Greece
6. First Department of Internal Medicine, AHEPA Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
7. First Department of Cardiology, AHEPA Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
8. Department of Internal Medicine, General Hospital of Kastoria, Kastoria, Greece
9. Second Department of Internal Medicine, General Hospital of Alexandroupoli, Democritus University of Thrace, Alexandroupoli, Greece
10. Department of Internal Medicine, Mpodosakio General Hospital of Ptolemaida, Ptolemaida, Greece
11. Department of Internal Medicine, General Hospital of Kozani, Kozani, Greece
12. Third Department of Internal Medicine, General Hospital Sotiria, National and Kapodistrian University of Athens, Athens, Greece
13. First Intensive Care Unit, General Hospital Evangelismos, National and Kapodistrian University of Athens, Athens, Greece
14. First Department of Pneumonology, General Hospital Sotiria, National and Kapodistrian University of Athens, Athens, Greece
15. First Department of Internal Medicine, Ioannina University Hospital, University of Ioannina, Ioannina, Greece
16. Infectious Diseases Unit, Laiko General Hospital, Athens, Greece
17. Internal Medicine Department, University Hospital of Patras, Patras, Greece
18. Fourth Department of Pneumonology, General Hospital Sotiria, Athens, Greece
19. Department of Cardiology, General Hospital of Elefsina Thriasio, Elefsina, Greece
20. Therapeutics Department, Alexandra Hospital, Athens, Greece
21. Second Medical Department, NIMTS Hospital, Athens, Greece
22. Department of Internal Medicine, General Hospital of West Attica Agia Varvara, Athens, Greece
23. Department of Cardiology, University of Patras Medical School, Patras, Greece
24. Second Department of Cardiology, AHEPA Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
25. Third Department of Cardiology, Hygeia Hospital, Athens, Greece
26. Department of Cardiology, Ioannina University Hospital, University of Ioannina, Ioannina, Greece
27. Department of Cardiology, University General Hospital of Larissa, Larissa, Greece
28. Third Department of Cardiology, General Hospital Sotiria, National and Kapodistrian University of Athens, Athens, Greece
29. Hospital Universitario y Politécnico La Fe, Valencia, Spain
30. Section of Cardiovascular Medicine, Yale University School of Medicine, New Haven, Connecticut
31. Fourth Department of Internal Medicine, Attikon Hospital, National and Kapodistrian University of Athens, Athens, Greece
32. Icahn School of Medicine at Mount Sinai, New York, New York