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Growth of bromodeoxyuridine-labeled adipose mesenchymal stem cells on silk fibroin material observed using an inverted microscope. (A) The majority of cells were short fusiform-shaped following 1 day of culture. (B) Cells were fusiform-shaped following 2 days of culture, and (C) cells increased and fused into clusters following 3 days of culture. Magnification, ×100. Cells are indicated by red circles.
