“…PRP was introduced in the early 50’s: since then, it has been employed in regenerative medicine, and extended to musculoskeletal disorders [ 58 , 60 , 61 ]. PRP has a high concentration of growth factors, such as TGF-β, VEGF, EGF, IGF-1, b-FGF, [ 62 , 63 ]. These growth factors and mediators enhance chemotaxis, angiogenesis, cell proliferation, and matrix formation of MSCs, accelerating tissue heling and improve regeneration [ 63 – 68 ].…”