What are the “positive” and “negative” symptoms of schizophrenia?

What are the “positive” and “negative” symptoms of schizophrenia? How are dopamine D1and D2 receptors related to positive and negative symptoms of schizophrenia? Whatgenetic, gestational, and neurologic risk factors are related to schizophrenia? Please use mainly the Reference/Source: 2022 Banasik, J. (2022). Pathophysiology (7th ed.). Elsevier Health Sciences (US).

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