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Representative high-magnification confocal images of fibroblast mono-culture tissue, organoid mono-culture tissue, and organoid/FB co-culture tissue after 8 days in culture upon immunostaining for cytokeratin 19 (CK19, white) and α-smooth muscle actin (α-SMA, red). α-SMA staining is visualized in the space between individual organoids. Scale bars, 30μm.
