RT Journal Article SR Electronic T1 The Cost of Closure JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 980 OP 981 DO 10.3174/ajnr.A1990 VO 31 IS 6 A1 H.J. Cloft YR 2010 UL http://www.ajnr.org/content/31/6/980.abstract AB