Vol. 206 No. 7, September 29, 2014. Pages 867–876.

Due to an error during the production process, an incorrect version of Fig. 3 was published. Specifically, incorrect images were included for the top two panels of part I, and several figure parts contained minor formatting and labeling errors. A corrected version of the figure is shown below.

The html and pdf versions of this article have been corrected. The error remains only in the print version.