1. Department of Behavioral and Clinical Neurology, Santa Lucia Foundation Istituto di Ricerca e Cura a Carattere Scientifico (IRCCS), Rome, Italy
2. Section of Human Physiology, University of Ferrara, Italy
3. Unit of Statistics, IRCCS Istituto Centro San Giovanni di Dio Fatebenefratelli, Brescia, Italy
4. Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy