Erratum to: Graefes Arch Clin Exp Ophthalmol

DOI 10.1007/s00417-014-2782-4

The original version of this article contained an error.

Particularly, it is stated that only in the abstract the two cohorts are made up of 9 and 9 patients, respectively. The actual number of the second cohort is 6. The number of patients of the two cohorts reported throughout the manuscript is correct.