RT Journal Article SR Electronic T1 In Vitro Transport of Radiolabeled Vitamins By the Small Intestine JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 251 OP 258 VO 5 IS 4 A1 Richard P. Spencer A1 Ted M. Bow YR 1964 UL http://jnm.snmjournals.org/content/5/4/251.abstract AB