RT Journal Article SR Electronic T1 Brain Perfusion Is Abnormal in Cocaine-Dependent Polydrug Users: A Study Using Technetium-99m-HMPAO and ASPECT JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 1206 OP 1210 VO 32 IS 6 A1 B. Leonard Holman A1 Paulo A. Carvalho A1 Jack Mendelson A1 Siew Koon Teoh A1 Rachel Nardin A1 Elizabeth Hallgring A1 Nancy Hebben A1 Keith A. Johnson YR 1991 UL http://jnm.snmjournals.org/content/32/6/1206.abstract AB