Erratum to: Causal inference-so much more than statistics.

In the print version and online PDF of this article, in Scenario 2 in the extended caption to Figure 1 (page 1898), the first path should read PE-Smoking-Addictive personality-Obesity rather than PE-SEP-Smoking-Addictive personality-Obesity and in the following sentence or SEP should not have been included. In the online version of this paper, the extended caption was omitted from Figure 1 in both the downloadable Powerpoint slide and the html version that opens in a new tab. The html version also omitted the image and incorrectly included a section of text from the paper that did not pertain to Figure 1. Further, the image was also omitted from the html version of Figure 2 that opens in a new tab, and that html version also incorrectly included a section of text from the paper that did not pertain to Figure 2. The article has been corrected.