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Morphology of mesenchymal stem cells in osteogenic media. (A) Day 0 (magnification, ×100); (B) day 2 (magnification, ×100); (C) day 5 (magnification, ×200); (D) day 7 (magnification, ×200); (E) day 14 (magnification, ×200); (F) day 21 (magnification, ×200); (G) day 28 (magnification, ×200).
