Institute of Human Genetics, University Medical Center Leipzig, Leipzig, Germany. Electronic address: simone.ahting@medizin.uni-leipzig.de.

Department of Pediatrics, Justus-Liebig-University Giessen, Giessen, Germany.

Pediatric Practice Friesenweg, Cystic Fibrosis Center Altona, Hamburg, Germany.

Division of pediatric Pulmonology and Allergology, Hospital for children and adolescents, University Medical Center Leipzig, Leipzig, Germany.

Division of Pneumology, University Medical Center Homburg, Homburg/Saar, Germany.

Division of Allergology and Pediatric Pneumology, University Children’s Hospital Bethel, University Medical Center Ostwestfalen-Lippe, Bielefeld, Germany.

Division of Pneumology, Allergology and Psychotherapy, Children’s Hospital, Helios Hospital Aue, Aue, Germany.

Cystic Fibrosis Center for Adults, Med. Klinik V, University Hospital LMU, Munich, Germany.

Division of Pneumology, II. Department of Medicine and University Transplant Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.

Department for General Paediatrics, Neonatology and Paediatric Cardiology, University Hospital Düsseldorf, Düsseldorf, Germany.

University Children’s Hospital, University Medical Center Erlangen, Erlangen, Germany.

Department of Respiratory Medicine, Hannover Medical School, Hannover, Germany.

Division of Pediatric Pneumology, Center for Pediatric and Women’s Medicine Kassel, Kassel, Germany.

University Children’s Hospital Schwabing, Technical University of Munich, Munich, Germany.

Department of medical clinic I, Medical Center Carl Gustav Carus, Technical University of Dresden, Dresden, Germany.

Department Medicine, HMU-Health and Medical University Potsdam and Director CF Center Westbrandenburg, Division Cystic Fibrosis, Clinic Westbrandenburg, Potsdam, Germany.

Christiane Herzog CF-centre Frankfurt/Main, University Medical Center Frankfurt, Goethe-University Frankfurt, Frankfurt/Main, Germany.

Cystic Fibrosis Center, Thoraxklinik Heidelberg, University Medical Center Heidelberg, Heidelberg, Germany.

Institute of Human Genetics, University Medical Center Leipzig, Leipzig, Germany.