Erratum to: Tech Coloproctol (2011) 15:417–422 DOI 10.1007/s10151-011-0769-2

In the original published article the following paragraph:

“Conflict of interest: The authors have declared that no conflict of interest exists”

was erroneously added by the publisher after proof reading. The authors declared that a conflict of interest existed by stating that

“This study was supported by Karl Storz GmbH & Co in the form of grants and equipment. The senior author, Piercarlo Meinero, has a patent license agreement with Karl Storz GmbH & Co concerning the fistuloscope kit”

but this statement was placed under “Acknowledgements”.