Crisafulli, Ernesto
Barbeta, Enric
Ielpo, Antonella
Torres, Antoni
Article History
Received: 29 June 2018
Accepted: 15 August 2018
First Online: 2 October 2018
Ethics approval and consent to participate
: Not applicable, as the article is a narrative review, based on a search on Medline.
: Not applicable, as the article is a narrative review, based on a search on Medline.
: The authors report no conflicts of interest about this manuscript. AT is a member of the Editorial Board of <i>Multidisciplinary Respiratory Medicine</i>.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.