Footnotes
This manuscript has recently been accepted for publication in the European Respiratory Journal. It is published here in its accepted form prior to copyediting and typesetting by our production team. After these production processes are complete and the authors have approved the resulting proofs, the article will move to the latest issue of the ERJ online. Please open or download the PDF to view this article.
Conflict of interest: Dr. Giovanni Battista Migliori has nothing to disclose.
Conflict of interest: Dr. Sotgiu has nothing to disclose.
Conflict of interest: Dr. Rosales-Klintz has nothing to disclose.
Conflict of interest: Dr. van der Werf has nothing to disclose.
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