?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Anna+B&rft.au=Jacobsen%2C+Anna+B&rft.aulast=Jacobsen&rft.title=Journal+of+Neurology&rft.issue=3&rft.date=2025&rft.atitle=Variability+of+the+Penn+upper+motor+neuron+score+in+amyotrophic+lateral+sclerosis%3A+need+for+a+revised+score&rft.volume=272&rft.genre=article