Footnotes

• Linked articles 156018, 140822.

• Other members of the Italian Cystic Fibrosis Society (SIFC) Study Group for H1N1: F Alghisi, Unit of Cystic Fibrosis, Department of Paediatric Medicine, Bambino Gesù Children's Hospital, IRCCS, Rome; B M Assael, Cystic Fibrosis Center, Verona; E Bignamini, Pneumology Unit, Regina Margherita Paediatric Hospital, Turin; M Collura, Cystic Fibrosis Center, Di Cristina Hospital, Palermo; S Cristadoro, CF and Paediatric Gastroenterology Unit, University of Messina, Messina; R Gagliardini, Regional Cystic Fibrosis Center, Department of Paediatrics, Ospedali Riuniti, Ancona; A Manca, Cystic Fibrosis Center, University of Bari, Bari; S Notarnicola, Cystic Fibrosis Center, Paediatric Clinics University of Genova, G. Gaslini Children Hospital, Genova; A Negri, Department of Paediatrics, Ospedale di Livorno, Livorno; R Padoan, Cystic Fibrosis Service, AO Spedali Civili, Brescia; G Pizzamiglio, Respiratory Medicine and Cystic Fibrosis Adult Section, Dipartimento Toraco-Polmonare e Cardiocircolatorio, Università degli Studi di Milano, IRCCS Fondazione Ospedale Maggiore Policlinico Cà Granda, Milano; F Poli, Cystic Fibrosis Center, Ospedale Infantile Burlo Garofolo, Trieste; S Quattrucci, Cystic Fibrosis Regional Center, Sapienza University of Rome, Rome; L Ratclif, U.O.S. Cystic Fibrosis, Cerignola; D Salvatore, Cystic Fibrosis Center, Paediatric Division, San Carlo Hospital, Potenza; V Terlizzi, Department of Paediatrics University of Naples Federico II, Naples.

• Competing interests None.

• Provenance and peer review Not commissioned; externally peer reviewed.