RT Journal Article SR Electronic T1 Assessing the upper motor neurone: novel UMN biomarkers are needed for clinical trials JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 3 OP 3 DO 10.1136/jnnp-2021-327948 VO 93 IS 1 A1 Robert D Henderson A1 Matthew S Devine YR 2022 UL http://jnnp.bmj.com/content/93/1/3.abstract AB