Erratum to: Med Mol Morphol DOI 10.1007/s00795-015-0103-6

The corresponding author of the article would like to remove the author’s name “Michihiko Waki” and include “Shinsuke Hayamizu” in the author group. The revised author group is given below.

Shogo Tajima · Shinsuke Hayamizu · Masashi Fukuyama

In addition, the authors would like to add acknowledgments section as follows:

Acknowledgments The authors would like to thank Michihiko Waki for his excellent technical assistance.