1 AOU Città della Salute e della Scienza di Torino SC Pneumologia Presidio Regina Margherita, Turin, Italy. Electronic address: espirene75@gmail.com.
2 Clinical and Academic Unit of Sleep & Breathing, Royal Brompton & Harefield NHS Foundation Trust, London, UK. Electronic address: m.chatwin@rbht.nhs.uk.
3 Department of Surgical, Oncological and Oral Science (Di.Chir.On.S.), Section of Anaesthesia, Analgesia, Intensive Care and Emergency, Policlinico Paolo Giaccone, University of Palermo, Italy. Electronic address: giuseppe.accurso86@gmail.com.
4 Department of Surgical, Oncological and Oral Science (Di.Chir.On.S.), Section of Anaesthesia, Analgesia, Intensive Care and Emergency, Policlinico Paolo Giaccone, University of Palermo, Italy. Electronic address: andrea.cortegiani@unipa.it.
5 Department of Surgical, Oncological and Oral Science (Di.Chir.On.S.), Section of Anaesthesia, Analgesia, Intensive Care and Emergency, Policlinico Paolo Giaccone, University of Palermo, Italy. Electronic address: cesare.gregoretti@unipa.it.
6 AOU Città della Salute e della Scienza di Torino SC Pneumologia Presidio Regina Margherita, Turin, Italy. Electronic address: elisabetta.bignamini@gmail.com.