Assertion: funnel plot | /r/HasProperty | introduced by light
Facets:
value: in 1984
type: TEMPORAL
value: in 1994
type: TEMPORAL
Source sentences:
text: Funnel plots, introduced by Light and Pillemer in 1994  and discussed in detail by Egger and colleagues,  are useful adjuncts to meta-analyses.
text: Funnel plots, introduced by Light and Pillemer in 1984 and discussed in detail by Matthias Egger and colleagues, are useful adjuncts to meta-analyses.