In the article that appeared on page 29 of the January/February 2016 issue, the Open Access information was missing. The article should have printed with the OPEN icon and the following chapter footnote:

This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (CCBY-NC-ND), where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially.

The article has been corrected online.

Reference