1. UOC Pneumologia, Dipartimento Neuroscienze, Organi di Senso e Torace Fondazione Policlinico Universitario A. Gemelli IRCCS Rome Italy
2. Service of Pulmonology, Health District of Bolzano (SABES‐ASDAA) Bolzano‐Bozen Italy
3. Lehrkrankenhaus der Paracelsus Medizinischen Privatuniversität Salzburg Austria
4. Pulmonary Medicine Unit, Codogno Hospital Azienda Socio Sanitaria Territoriale Lodi Codogno Italy
5. Ippocrate Medical Center, Castelnuovo di Garfagnana Lucca Italy