Assertion: urine's level | /r/RelatedTo | rejection
Facets:
value: previously
type: TEMPORAL
Source sentences:
text: Investigators led by Peter Heeger, M.D., of the Icahn School of Medicine at Mount Sinai in New York City, and Donald Hricik, M.D., of Case Western Reserve University in Cleveland, measured the urinary levels of molecules that had previously been associated with rejection.