Kuehni Claudia E, Goutaki Myrofora, Kobbernagel Helene E
Institute of Social and Preventive Medicine, University of Bern, Switzerland
Paediatric Respiratory Medicine, Children's University Hospital of Bern, University of Bern, Switzerland.
Eur Respir J. 2017 Feb 23;49(2). doi: 10.1183/13993003.02514-2016. Print 2017 Feb.