RT Journal Article SR Electronic T1 Persistent postural-perceptual dizziness: a useful new syndrome JF Practical Neurology JO Pract Neurol FD BMJ Publishing Group Ltd SP 3 OP 4 DO 10.1136/practneurol-2017-001817 VO 18 IS 1 A1 Barry M Seemungal A1 Luca Passamonti YR 2018 UL http://pn.bmj.com/content/18/1/3.abstract AB