1 First Department of Cardiology, Hippokration Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece. Electronic address: soulaidopoulos@hotmail.com.
2 Second Cardiology Department, Attikon Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece.
3 Department of Neurology, Evangelismos Hospital, Athens, Greece.
4 First Department of Cardiology, Hippokration Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece.