1 Laboratory of Medical Physics, School of Medicine, National and Kapodistrian University of Athens, 11528 Athens, Greece.
2 First Department of Neurology, Aeginition Hospital, School of Medicine, National and Kapodistrian University of Athens, 11528 Athens, Greece.
3 Second Department of Psychiatry, Attikon General University Hospital, School of Medicine, National and Kapodistrian University of Athens, 12462 Athens, Greece.
4 Department of Neurology, School of Medicine, Democritus University of Thrace, 68100 Alexandroupolis, Greece.
5 Medical Imaging Research Unit, School of Medicine, National and Kapodistrian University of Athens, 11528 Athens, Greece.
6 School of Medicine, Democritus University of Thrace, 68100 Alexandroupolis, Greece.