RT Journal Article SR Electronic T1 Motor neurone disease: diagnostic pitfalls JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 97 OP 100 DO 10.7861/clinmedicine.13-1-97 VO 13 IS 1 A1 Timothy L Williams YR 2013 UL http://www.rcpjournals.org/content/13/1/97.abstract