[1] Hosp Santa Maria, Cyst Fibrosis Ctr, Lisbon, Portugal
[2] Hosp Dona Estefanea, Cyst Fibrosis Ctr, Lisbon, Portugal
[3] Hosp Pediat Coimbra, Cyst Fibrosis Ctr, Coimbra, Portugal
[4] Ospitais Univ Coimbra, Cyst Fibrosis Ctr, Coimbra, Portugal
[5] Hosp Sao Joao, Cyst Fibrosis Ctr, Oporto, Portugal
[6] Ctr Hosp Porto, Cyst Fibrosis Ctr, Oporto, Portugal
[7] Hosp Divino Espirito Santo, Dept Pediat, Ponta Delgada, Portugal
[8] Hosp Funchal, Dept Pediat, Funchal, Portugal