**4. Pathophysiology and clinical implications of EGF/PDGF/VEG**

It is known that other several growth factors regulate developmental processes, among which are the Epidermal Growth Factor (EGF), Fibroblast Growth Factor (FGF), growth fac‐ tor Insulin-like type I (IGF-I) and Platelet Derived Growth Factor platelet (PDGF).
