[1] Cyst Fibrosis Ctr Florence, Florence, Italy
[2] United Hosp, Cyst Fibrosis Ctr, Mother Child Dept, Ancona, Italy
[3] Bambino Gesu Pediat Hosp, Cyst Fibrosis Ctr, IRCCS, Rome, Italy
[4] Policlin Umberto 1, Cyst Fibrosis Ctr, Rome, Italy
[5] Sapienza Univ Rome, Dept Publ Hlth & Infect Dis, Rome, Italy
[6] Cyst Fibrosis Ctr Messina, Messina, Italy
[7] Azienda Osped Univ Integrata, Cyst Fibrosis Ctr, Verona, Italy
[8] Cyst Fibrosis Ctr Palermo, Palermo, Italy
[9] Univ Milan, Dept Hlth Sci, Milan, Italy
[10] Univ Messina, Dept Adult & Child Human Pathol, Messina, Italy