Received: 25 July 2018
Accepted: 20 January 2019
First Online: 4 March 2019
Ethics approval and consent to participate
: IRB (Institutional Review Board) approval of “Fondazione Policlinico Universitario A. Gemelli IRCCS” was obtained for this retrospective analysis IRB: P/ CE 5857/19.
: Not applicable.
: No competing interests have to be reported by the authors in relation to this work. AS and LR are Associate Editors of Multidisciplinary Respiratory Medicine.
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