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(a) Densities of adherent osteoclasts on bovine bone slices after incubation with poly(ethylene sodium phosphate) (PEP·Na) for 24 h (n = 4). Student’s t-test was performed on the samples to test the statistical significance of differences (*p < 0.005). (b) Optical micrographs of adherent osteoclasts on a bovine bone slice after cultivation with PEP·Na for 24 h. Scale bars represent 100 μm. Reproduced with permission from reference [36]. Copyright 2015 by Wiley Interscience.
