Assertion: funnel plot | /r/ObjectUse | used as visual aid
Facets:
value: to detecting bias
type: PURPOSE
value: primarily
type: DEGREE
Source sentences:
text: It is used primarily as a visual aid to detecting bias or systematic heterogeneity.
text: It is used primarily as a visual aid to detecting bias or systematic heterogeneity.
text: It is used primarily as a visual aid for detecting bias or systematic heterogeneity.