1 Dept of Pathophysiology and Transplantation, University of Milan, Cardio-thoracic unit and Adult Cystic Fibrosis Center, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Milan, Italy stefano.aliberti@unimi.it.
2 Fortis Hospital, Pulmonology and Critical Care, Kolkata, India.
3 Mayo Clinic, Pulmonary Disease and Critical Care Medicine, Rochester, MN, USA.
4 Department of Respiratory Medicine, Concord Hospital, Concord Clinical School, University of Sydney, Sydney, Australia.
5 Tayside Respiratory Research Group, University of Dundee, Dundee, UK.