1. Instytut Gruźlicy i Chorób Pluc; Oddzial Terenowy im. Jana i Ireny Rudników w Rabce-Zdrój; Klinika Pneumonologii i Mukowiscydozy; Rabka-Zdrój Poland
2. Hôpital Arnaud de Villeneuve; Centre des Maladies Respiratoires; Montpellier France
3. Centrum Pro Cystickou Fibrosu; Pediatricka Klinika; Fakultní nemocnice v Motole; Praha Czech Republic
4. Justus-Liebig Universität Gießen; Pädiatrische Pneumologie und Allergologie; Mukovizidose-Zentrum; Zentrum für Kinderheilkunde und Jugendmedizin; Gießen Germany
5. Kaposi Mór Oktatókórház; Gyermekpulmonológiai Részleg; Mosdós Hungary
6. Federal State Institution-Scientific Research Pulmonology Institute under the Roszdrav Laboratory of Cystic Fibrosis; Moscow Russia
7. Complejo Hospitalario Universitario La Coruña; Servicio de Neumologia; A Coruña Spain
8. Corporate Clinical Development; Chiesi Farmaceutici, S.p.A.; Parma Italy
9. Chiesi Pharmaceuticals, Inc.; Rockville Maryland
10. Institute of Pediatrics; Obstetrics and Gynecology; Department of Respiratory Diseases and Ecological Problems of Children's Health; Kyiv Ukraine