RT Journal Article SR Electronic T1 The Authors' Reply JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 444 OP 445 VO 16 IS 5 A1 Andrew J. Tofe A1 Marion D. Francis YR 1975 UL http://jnm.snmjournals.org/content/16/5/444.2.abstract AB