1 Department of Neurology I.C., Oasi Institute for Research on Mental Retardation and Brain Aging (IRCCS), Via C. Ruggero 73, 94018 Troina, Italy. Electronic address: [email protected].
2 Neurology Service, CHU Clermont-Ferrand, Faculty of Medicine, University Clermont 1, EA 7280, Clermont-Ferrand, France. Electronic address: [email protected].
3 Minnesota Regional Sleep Disorders Center, Department of Psychiatry, Hennepin County Medical Center, University of Minnesota Medical School, Minneapolis, MN, USA. Electronic address: [email protected].