1. Second Department of Neurology, Attikon University Hospital, School of Medicine, National & Kapodistrian University of Athens, 15784 Athens, Greece
2. Physical Therapy Department, University of West Attica, 12210 Athens, Greece
3. Laboratory of Neuromuscular and Cardiovascular Study of Motion (Lanecasm), 12243 Athens, Greece
4. Department of Physiology, Faculty of Medicine, University of Ioannina, 45110 Ioannina, Greece
5. Department of Internal Medicine, Faculty of Medicine, University of Ioannina, 45110 Ioannina, Greece