RT Journal Article SR Electronic T1 Reply JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 550 OP 551 VO 32 IS 3 A1 Carlos M. Duncker A1 Ignasi Carrió A1 Lluis Berná YR 1991 UL http://jnm.snmjournals.org/content/32/3/550.abstract AB