1. From the Department of Neurology (R.M., J.G.), Hospital de Navarra, Pamplona, Spain; the Sleep Unit, Department of Pneumology (J.D.-C., R.R., G.D.), Hospital Txagorritxu, Vitoria-Gasteiz, Spain; the Department of Neurology (E.M.-V.), Clínica Universitaria de Navarra, Pamplona, Spain; and the Research Unit (F.A.), Hospital Txagorritxu, Vitoria-Gasteiz, Spain.