| http://www.w3.org/ns/prov#value | - Although the mechanisms by which neuronal cells control the timing of cell proliferation and differentiation are still poorly understood, animal and cell-based studies have shown that a number of extrinsic factors, including growth factors and cytokines, such as epidermal growth factor (EGF), platelet-derived growth factor, and brain-derived neurotrophic factor, have crucial influence on the funct
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