RT Journal Article SR Electronic T1 Use of sitting position to relieve myelographic obstruction. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 502 OP 503 VO 7 IS 3 A1 R Crane A1 M T Margolis YR 1986 UL http://www.ajnr.org/content/7/3/502.abstract AB