RT Journal Article SR Electronic T1 Mass Lesions of the Brain in AIDS: The Dilemmas of Distinguishing Toxoplasmosis from Primary CNS Lymphoma JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 554 OP 555 VO 24 IS 4 A1 Berger, Joseph R. YR 2003 UL http://www.ajnr.org/content/24/4/554.abstract AB