Assertion: tryptophan's level | /r/HasAspect | no effect
Facets:
value: on survival
type: TRANSITIVE-OBJECT
Source sentences:
text: However, the ATBC study found that baseline serum beta-carotene and retinol levels and supplemental beta-carotene had no effect on survival .
text: Additionally, the levels found in a turkey dinner are far, far too low to have such an effect.