Erratum to: Cell Tissue Res (2015)

DOI 10.1007/s00441-015-2332-3

In the original publication, the below funding information was not included.

This work was supported by the Polish National Science Centre Grant based on decision UMO-2012/05/D/NZ4/02982 and, in part, by Medical University of Lodz grants no. 503/6-086-02/503-01 and 502-03/6-086-02/502-64-061.