RT Journal Article SR Electronic T1 Inclusion of children with airway disease for the development of spirometry reference data JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1292 OP 1293 DO 10.1183/13993003.02028-2015 VO 47 IS 4 A1 Sooky Lum A1 Janet Stocks YR 2016 UL http://erj.ersjournals.com/content/47/4/1292.abstract AB