Erratum to: Cell Tissue Res

DOI 10.1007/s00441-016-2513-8

The original version of this article inadvertently contained a mistake.

In the 11th page of the article, left column, 7th line, “…along its surface (Fig. 6d, d’ red arrowheads)….”

Change to “…along its surface (Fig. 5d, d’ red arrowheads)….”