Fig. (3) Effect of platelet-rich plasma (PRP) on the proliferation of bone marrow stromal cells (BMSCs). The numbers of cells cultured with PRP with different concentrations of platelets were shown. (p < 0.05 * : versus control, † : versus 15.6 x 104/μl, ‡ : versus 31.2 x 104/μl, §: versus 62.5 x 104/μl, || : versus 125 x 104/μl, ¶ : versus 250 x 104/μl, ** : versus 500x 104/μl).