RT Journal Article SR Electronic T1 E Genetic aspects/testing JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP A23 OP A25 VO 79 IS Suppl 1 YR 2008 UL http://jnnp.bmj.com/content/79/Suppl_1/A23.abstract AB