RT Journal Article SR Electronic T1 Utilisation of retinal vein photoplethysmography to measure intracranial pressure JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 104 OP 106 DO 10.1136/jnnp-2019-321072 VO 92 IS 1 A1 William H Morgan A1 Ying Jo Khoo A1 Allan G Kermode A1 Christopher R Lind A1 Martin L Hazelton A1 Kirsty E Parsons A1 Dao Yi Yu YR 2021 UL http://jnnp.bmj.com/content/92/1/104.abstract AB