1 Service de pneumologie, Cliniques Universitaires Saint-Luc, Bruxelles et Institut de Recherche Expérimentale et Clinique, UCLouvain, Bruxelles, Belgium.
2 Laboratory of Molecular & Cellular Pneumonology, Department of Respiratory Medicine, School of Medicine, University of Crete, Heraklion, Greece.
3 Respiratory Medicine Section, Department of Clinical Medicine and Surgery, Federico II University, Naples, Italy.
4 Laboratory of Molecular Surfaces and Nanotechnologies (LAMSUN), University of Catania, Catania, Italy.