RT Journal Article SR Electronic T1 When Reversible Ligands Do Not Reverse, and Other Modelers' Dilemmas JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 1005 OP 1008 DO 10.2967/jnumed.109.073445 VO 51 IS 7 A1 Mark Slifstein YR 2010 UL http://jnm.snmjournals.org/content/51/7/1005.abstract AB