RT Journal Article SR Electronic T1 The Scintigraphic Investigation of Sacroiliac Disease: Influence of Age on the Uptake Ratio between Sacroiliac and Os Sacrum—Reply JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 1242 OP 1242 VO 18 IS 12 A1 B. C. Lentle A1 A. S. Russell A1 J. S. Percy A1 F. I. Jackson YR 1977 UL http://jnm.snmjournals.org/content/18/12/1242.abstract AB