RT Journal Article SR Electronic T1 MR of extramedullary hematopoiesis causing cord compression in beta-thalassemia. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1407 OP 1409 VO 13 IS 5 A1 Kalina, P A1 Hillstrom, M M YR 1992 UL http://www.ajnr.org/content/13/5/1407.abstract