RT Journal Article SR Electronic T1 Acute Gastrointestinal Hemorrhage Detected by Selective Scintigraphic Angiography JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 1601 OP 1604 VO 32 IS 8 A1 James K. St. George A1 Jeffrey S. Pollak YR 1991 UL http://jnm.snmjournals.org/content/32/8/1601.abstract AB