RT Journal Article SR Electronic T1 Enzymatic Synthesis and Use of 13N-Labeled L-Asparagine for Myocardial Imaging JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 1223 OP 1225 VO 15 IS 12 A1 Alan S. Gelbard A1 Laurence P. Clarke A1 John S. Laughlin YR 1974 UL http://jnm.snmjournals.org/content/15/12/1223.abstract AB