RT Journal Article SR Electronic T1 Allele frequencies of the third component of complement (C3) in MS patients. JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 554 OP 555 DO 10.1136/jnnp.54.6.554 VO 54 IS 6 A1 D E Bulman A1 H Armstrong A1 G C Ebers YR 1991 UL http://jnnp.bmj.com/content/54/6/554.abstract AB No difference was found in the allele frequency of C3 (third component of complement) in 129 multiple sclerosis (MS) patients compared with both 69 controls or with similar reported controls from the published literature. An association cannot be confirmed between C3 and MS.