Erratum: Marker-free phase nanoscopy

Nature Photon. 7, 113–117 (2013); published online 20 January 2013; corrected online 16 April 2013. In the version of this Letter originally published online, no competing financial interests were declared. However, the authors wish to acknowledge a relevant patent. The competing financial interestsstatement has been modified as shown below in the HTML and PDF versions of the Letter: