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This article [J. Biomed. Opt. 17, 081411 (2012)] was originally published online on 14 June 2012 with mismatched captions for Figs. 4, 5, and Video 1. The corrected figures and captions are reprinted below. Video 1A video of the whole channel. (QuickTime, 186 KB) [URL: http://dx.doi.org/10.1117/1.JBO.17.8.081411.1]. ![]() The article was corrected online on 15 June 2012. It appears correctly in print. |