PRP, also referred to as platelet-rich GFs, has a platelet concentration that is 5 to 7 times higher than that of peripheral blood, and was initially prepared as a blood product for treating thrombocytopenia.[19] Research by Amable et al demonstrated that PRP is rich in platelet-derived GFs (PDGFs), epidermal growth factor (EGF), transforming growth factor, and cytokines. The gene discussed is EGF; the disease is Thrombocytopenia.