RT Journal Article SR Electronic T1 Letter to the Editor JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 769 OP 771 VO 8 IS 10 A1 Popham, Mary G. A1 Fowler, J. F. YR 1967 UL http://jnm.snmjournals.org/content/8/10/769.abstract AB