1 Humanitas Clinical and Research Center IRCCS, Rozzano, Milan, Italy; National and Kapodistrian University of Athens, Athens, Greece. Electronic address: dvrachatis@gmail.com.
2 Department of Cardiology, General Hospital of Athens "G. Gennimatas", Athens, Greece.
3 National and Kapodistrian University of Athens, Athens, Greece.
4 Evangelisches Krankenhaus Hagen-Haspe, Clinic for Cardiology and Electrophysiology, Hagen, Germany.
5 Humanitas Clinical and Research Center IRCCS, Rozzano, Milan, Italy.
6 Section of Cardiovascular Medicine, Department of Internal Medicine, Yale School of Medicine, New Haven, CT, USA.