RT Journal Article SR Electronic T1 SYMPOSIA SERIES IN IMMUNOBIOLOGICAL STANDARDIZATION, VOL. 10: INTERNATIONAL SYMPOSIUM ON BIOLOGICAL ASSAY METHODS JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 493 OP 493 DO 10.1136/jnnp.32.5.493-a VO 32 IS 5 A1 Gillespie, J. S. YR 1969 UL http://jnnp.bmj.com/content/32/5/493.2.abstract AB