RT Journal Article SR Electronic T1 Correction of Attenuation in Whole-Body Determination of Co-57 B12 Absorption: Concise Communication JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 949 OP 951 VO 24 IS 10 A1 John A. Cardarelli A1 Belton A. Burrows A1 Aaron Miller A1 D. Ward Slingerland YR 1983 UL http://jnm.snmjournals.org/content/24/10/949.abstract AB