RT Journal Article SR Electronic T1 Gel Chromatography as an Analytical Tool for 99mTc Radiopharmaceuticals JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 722 OP 723 VO 15 IS 8 A1 M. W. Billinghurst A1 R. F. Palser YR 1974 UL http://jnm.snmjournals.org/content/15/8/722.2.abstract AB