RT Journal Article SR Electronic T1 Assessment of respiratory muscle strength in motor neurone disease: is asking enough? JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 245 OP 246 DO 10.1183/09031936.00167509 VO 35 IS 2 A1 P. Murphy A1 R. Lyall A1 N. Hart A1 M. I. Polkey YR 2010 UL http://erj.ersjournals.com/content/35/2/245.abstract AB