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Histological view of hematoxylin and eosin (H&E) stained specimens obtained at 2 weeks after surgery. Black box is the area of interest. (A–C) Control group; (D–F) rGO2 group; (G–I) rGO4 group; (J–L) rGO10 group; OB: old bone, NB: new bone, GM: bone graft material (Original magnifications: 12.5× (A,D,G,J), 40× (B,E,H,K), 100× (C,F,I,L)).
