RT Journal Article SR Electronic T1 The role of facemask spirometry in motor neuron disease JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 385 OP 386 DO 10.1136/thoraxjnl-2012-201804 VO 68 IS 4 A1 Banerjee, Sandip Kamakhya A1 Davies, Michael A1 Sharples, Linda A1 Smith, Ian YR 2013 UL http://thorax.bmj.com/content/68/4/385.abstract AB