RT Journal Article SR Electronic T1 Surfactant protein A in chronic extrinsic allergic alveolitis JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1543 OP 1544 DO 10.1183/09031936.00192111 VO 39 IS 6 A1 Martina Sterclova A1 Martina Vasakova A1 Peter Paluch A1 Milan Paulik YR 2012 UL http://erj.ersjournals.com/content/39/6/1543.abstract AB