[1] Fdn Policlin Univ A Gemelli IRCCS, Dipartimento Neurosci Organi Senso & Torace, UOC Pneumol, I-00168 Rome, Italy
[2] Univ Cattolica Sacro Cuore, Fac Med & Chirurg, I-00168 Rome, Italy
[3] Univ Insubria, St Anna Hosp Como, Div Pulmonol, I-21100 Varese, Italy
[4] Univ Cattolica Sacro Cuore, Fdn Policlin Univ Agostino Gemelli IRCCS, Thorac Surg, I-00168 Rome, Italy
[5] Dartmouth Hitchcock Med Ctr, Sect Pulm & Crit Care Med, Lebanon, NH 03766 USA