RT Journal Article SR Electronic T1 Proximal muscle weakness JF Practical Neurology JO Pract Neurol FD BMJ Publishing Group Ltd SP 321 OP 325 DO 10.1136/practneurol-2019-002204 VO 19 IS 4 A1 Paloma Gonzalez-Perez A1 Matthew Torre A1 Jeffrey Helgager A1 Anthony A. Amato YR 2019 UL http://pn.bmj.com/content/19/4/321.abstract AB