1 Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics and Maternal/Child Sciences (DINOGMI), Polyclinic Hospital San Martino IRCCS, University of Genoa, Genoa, Italy.
2 Postgraduate School of Occupational Medicine, Università Cattolica del Sacro Cuore, Rome, Italy; Department of Woman/Child and Public Health, Fondazione Policlinico "A Gemelli" IRCCS, Rome, Italy.
3 Sleep-related Breathing Disorders Working Group, Italian Respiratory Society, Milan, Italy; Pneumology Unit, San Jacopo Hospital, Pistoia, Italy.
4 Laboratory for Industrial and Applied Mathematics, Department of Mathematics and Statistics, York University, York, ON M3J 1P3, Canada. Electronic address: bragazzi@yorku.ca.