RT Journal Article SR Electronic T1 Two heads are better than one: benefits of joint models for ALS trials JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP jnnp-2019-320553 DO 10.1136/jnnp-2019-320553 A1 Ruben P A van Eijk A1 James Rooney A1 Orla Hardiman A1 Leonard H van den Berg YR 2019 UL http://jnnp.bmj.com/content/early/2019/04/11/jnnp-2019-320553.abstract AB