RT Journal Article SR Electronic T1 To the Editors: Uneven use of noninvasive ventilation in acute respiratory failure in Europe JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1536 OP 1536 DO 10.1183/09031936.00192010 VO 37 IS 6 A1 J. Nasiłowski A1 J. Zieliński A1 R. Chazan YR 2011 UL http://erj.ersjournals.com/content/37/6/1536.abstract AB