RT Journal Article SR Electronic T1 Yes Virginia there is a Santa Claus JF Journal of NeuroInterventional Surgery JO J NeuroIntervent Surg FD BMJ Publishing Group Ltd. SP 99 OP 99 DO 10.1136/jnis.2009.001347 VO 1 IS 2 A1 Robert W Tarr YR 2009 UL http://jnis.bmj.com/content/1/2/99.abstract AB