1. Interdepartmental Sleep Research Centre, Department of Medical Sciences and Public Health University of Cagliari Monserrato Italy
2. Section of Neurology Department of Clinical and Experimental Medicine University of Pisa Pisa Italy
3. Sleep Medicine Centre Department of Pneumology, ASST Santi Paolo e Carlo PO San Carlo Borromeo‐Milan Milano Italy
4. Unit of Occupational Medicine Department of Medical Sciences and Public Health University of Cagliari Monserrato Italy