RT Journal Article SR Electronic T1 Capture-recapture methods in surveys of diseases of the nervous system JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 2 OP 3 DO 10.1136/jnnp.64.1.2 VO 64 IS 1 A1 CHRISTOPHER N MARTYN YR 1998 UL http://jnnp.bmj.com/content/64/1/2.abstract AB