Erratum to: Urol Res (2012) 40:61–65 DOI 10.1007/s00240-011-0402-x

Unfortunately, one author name was inadvertently not included in the author group/affiliation of the original publication. The complete authors group should read as:

S. Yilmaz · M. Pekdemir · N. M. Aksu · N. Koyuncu · O. Cinar · E. Akpinar