Fig. 1
![Fig. 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs41021-020-0144-5/MediaObjects/41021_2020_144_Fig1_HTML.png)
Phase-contrast pictures of Immunocytochemistry assay: strong staining was seen with primary antibody to vimentin as a marker for stromal cells (200× magnification)
Phase-contrast pictures of Immunocytochemistry assay: strong staining was seen with primary antibody to vimentin as a marker for stromal cells (200× magnification)