RT Journal Article SR Electronic T1 Standardised lung function testing JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 155 OP 157 DO 10.1183/09031936.93.06020155 VO 6 IS 2 A1 Gibson, GJ YR 1993 UL http://erj.ersjournals.com/content/6/2/155.abstract AB