(This article was originally published online on February 10, 2009 and is included in the present issue, pp. 21–34).
The citation to Ringach et al. (2002) was incorrectly listed as:
Ringach, D.L., Bredfeldt, C.E., Shapley, R.M. & Hawken, M.J. (2002). Suppression of neural responses to nonoptimal stimuli correlates with tuning selectivity in macaque V1. Journal of Neurophysiology 87, 1018–1027.
The correct in-text citation should be Ringach (2002), and the correct reference is:
Ringach, D.L. (2002). Spatial structure and symmetry of simple-cell receptive fields in macaque primary visual cortex. J Neurophysiol, 88:455–463.