RT Journal Article SR Electronic T1 Pulmonary apex schwannoma JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 719 OP 719 DO 10.1136/jnnp.63.6.719 VO 63 IS 6 A1 ASHKAN, KEYOUMARS A1 CASEY, ADRIAN T H YR 1997 UL http://jnnp.bmj.com/content/63/6/719.abstract AB