RT Journal Article SR Electronic T1 Experts Urge Cautious Interpretation of Higher Risk Estimates JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 13A OP 19A VO 31 IS 4 A1 Sarah M. Tilyou YR 1990 UL http://jnm.snmjournals.org/content/31/4/13A.abstract AB