1 Department of Anesthesia, Post Anesthesia Care Unit and Pain Service, M. Adelaide Hospital, Turin, Italy; Department of Emergency and Intensive Care CTO, M. Adelaide Hospital, Turin, Italy.
2 Emergency Department, Anesthesia and Intensive Care Unit, G. B. Morgagni Hospital, Forlì, Italy.
3 National Research Council of Italy, Institute of Biomedicine and Molecular Immunology "A. Monroy", Palermo, Italy.
4 Sleep Center, Istituto Scientifico di Pavia and Montescano, Fondazione S. Maugeri, IRCCS, Pavia, Italy.
5 Salvatore Maugeri Foundation, IRCCS, Division of Respiratory Disease, Scientific Institute of Veruno, Veruno, Italy.