RT Journal Article SR Electronic T1 Variability in airway inflammation sampled by bronchoalveolar lavage JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1766 OP 1767 DO 10.1183/09031936.96.09081766 VO 9 IS 8 A1 RE Ruffin YR 1996 UL http://erj.ersjournals.com/content/9/8/1766.abstract AB