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(A) Immunofluorescent staining of hBM-MSC grown on 1–24 kPa gradient after 28 days and the results for quantitation. Reprinted with permission from ref (38). Copyright 2015 Elsevier, Ltd. (B) Immunofluorescent staining of hBM-MSC grown on 20–200 kPa gradient after 2 and 4 weeks. Reprinted with permission from ref (147). Copyright 2016 Elsevier, Ltd.
