RT Journal Article SR Electronic T1 Orbit Roentgenology JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 1056 OP 1056 DO 10.1136/jnnp.41.11.1056-c VO 41 IS 11 A1 P. Macpherson YR 1978 UL http://jnnp.bmj.com/content/41/11/1056.4.abstract AB