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a) Funnel plot for all publications. Four publications (3,10 [including results prior to corticosteroid therapy in “active” oLP only],11,13) were found to reveal too extreme rate estimates for implant failure. b) Funnel plot for all publications following exclusion of outliers (3,10 [including results prior to corticosteroid therapy in “active” oLP only],11,13), revealing no risk of bias.
