University Hospital Cologne, Cologne, NRW, Germany
University Hospital Cologne, Cologne, Germany
University Hospital Cologne, Cologne, NRW, Germany
University Hospital Cologne, Cologne, North Rhine-Westphalia, Germany
Holger Gruell, Cologne, Germany
University of Cologne, Department of General, Visceral and Cancer Surgery, Cologne, Germany
University Hospital Cologne, Cologne, NRW, Germany
CF Center, University Hospital Cologne, Cologne, Germany
Pediatric Pulmonology and Sleep Medicine, Cystic Fibrosis Center, Children's Hospital, University of Duisburg-Essen, Essen, Germany
Ruhrlandklinik, Westdeutsches Lungenzentrum gGmbH, Essen, Germany