RT Journal Article SR Electronic T1 Definitions of chronic respiratory disease: what about children? JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1096 OP 1097 DO 10.1183/09031936.93.03091096 VO 3 IS 9 A1 Van Bever, H YR 1990 UL http://erj.ersjournals.com/content/3/9/1096.abstract AB