Assertion: valine's effect | /r/HasProperty | confounded by the fact
Facets:
Source sentences:
text: No influence of duration of IPP/VPP consumption was demonstrated either; however, the effect of duration of intake may have been confounded by the fact that longer-term studies were predominantly performed in PHT subjects (78% of the subjects with 12-week data), in whom the IPP/VPP effect was shown to be smaller.