RT Journal Article SR Electronic T1 Imaging Biomarkers and Surrogates: The Evolving Regulatory Lexicon JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 34N OP 35N VO 49 IS 6 A1 George Mills YR 2008 UL http://jnm.snmjournals.org/content/49/6/34N.abstract AB