RT Journal Article SR Electronic T1 Clinical guidelines and indications for bronchoalveolar lavage (BAL): extrinsic allergic alveolitis JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 945 OP 946 DO 10.1183/09031936.93.03080945 VO 3 IS 8 A1 Semenzato, G A1 Bjermer, L A1 Costabel, U A1 Haslam, PL A1 Olivieri, D YR 1990 UL https://publications.ersnet.org//content/3/8/945.abstract AB