RT Journal Article SR Electronic T1 What a jerk: perils in the assessment of psychogenic movement disorders JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 831 OP 831 DO 10.1136/jnnp-2012-304682 VO 84 IS 8 A1 Pollak, Thomas A YR 2013 UL http://jnnp.bmj.com/content/84/8/831.abstract AB