This article [J. Biomed. Opt. 17, 086010 (2012)] was originally published online on 17 August 2012 with an error in the author list. The name Annette Shröder was corrected to Annette Schröder, as it appears above. Also, a line was added to the acknowledgments that reads, “A.S. thanks Deutsche Forschungsgemeinschaft for funding support.”
This article was corrected online on 12 October 2012.