RT Journal Article SR Electronic T1 Maintenance of Licensure and Maintenance of Certification JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 22N OP 24N VO 49 IS 7 A1 Henry D. Royal YR 2008 UL http://jnm.snmjournals.org/content/49/7/22N.2.abstract AB