RT Journal Article SR Electronic T1 Commentary: NRC Requests Comments on Draft Guidance JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 18N OP 18N VO 58 IS 2 A1 Jeffry A. Siegel A1 Michael G. Stabin A1 Carol S. Marcus YR 2017 UL http://jnm.snmjournals.org/content/58/2/18N.abstract AB