Abstract Background Astrocytomas are the most common type of primary central nervous system tumors. They are frequently associated with genetic mutations that deregulate cell cycle and render these tumors resistant to apoptosis. STAT3. signal transducer and activator of transcription 3. https://atzbota8hcqy.collectblogs.com/79712210/environmental-protection-tax-and-total-factor-productivity-evidence-from-chinese-listed-companies