In the article that appeared on pages 460-461 of the September/October 2014 issue, the incorrect title was listed. "Comparative Effective, Covariates, Complex Treatment, and Complex Outcomes: A Response to Dahdah et al." should have been "Comparative Effectiveness, Covariates, Complex Treatment, and Complex Outcomes: A Response to Dahdah et al."

The authors regret the error.

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