De Boeck Kris, Tiddens Harm, Elborn Stuart, Fajac Isabelle
Paediatric Pulmonology, University Hospital Leuven, Herestraat 49, 3000 Leuven, Belgium.
Department of Paediatric Pulmonology and Allergology, Erasmus MS-Sophia, Rotterdam, The Netherlands.
Lancet Respir Med. 2013 Apr;1(2):99-101. doi: 10.1016/S2213-2600(13)70041-9. Epub 2013 Mar 21.