RT Journal Article SR Electronic T1 Non-invasive ventilation improves survival in patients with motor neuron disease JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 399 OP 399 DO 10.1136/thx.2006.la0201 VO 61 IS 5 A1 A McKendrick YR 2006 UL http://thorax.bmj.com/content/61/5/399.abstract AB