@book { editor = {Frey, U. and Gerritsen, J.}, title = {Respiratory Diseases in Infants and Children}, pages = {371}, year = {2006}, doi = {10.1183/1025448x.erm3706}, publisher = {European Respiratory Society}, isbn = {978-1-904097-83-9}, URL = {https://books.ersjournals.com/content/9781904097839/9781904097839} }