Fig. 6
![Fig. 6](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12917-017-0980-0/MediaObjects/12917_2017_980_Fig6_HTML.gif)
Von Kossa staining shows black stained mineralised extracellular matrix. Note also the black staining of the cell bodies. a Unlabelled ASCs incubated in osteogenic medium. b SPIO-labelled ASCs incubated in osteogenic medium. c Control with unlabelled ASCs incubated in standard medium