Text and Data Mining valid from 2019-04-08
Received: 12 November 2018
Accepted: 13 February 2019
First Online: 8 April 2019
Ethics approval and consent to participate
: Since it is a retrospective analysis, no ethical committee approval was required.
: All patients gave the consent to treat their data anonimously.
: The authors declare that they have no competing interests. RP is a member of the Editorial Board of Multidisciplinary Respiratory Medicine.
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