RT Journal Article SR Electronic T1 Non-invasive mechanical ventilation: when to start for what benefit? JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 979 OP 980 DO 10.1136/thx.2005.040394 VO 60 IS 12 A1 Fauroux, B A1 Lofaso, F YR 2005 UL http://thorax.bmj.com/content/60/12/979.abstract AB