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  1. Schizophrenia - Symptoms and causes - Mayo Clinic

  2. Schizophrenia: Symptoms, Causes, Treatment, and Prognosis - Healthline

  3. The 10 Most Common Signs of Schizophrenia | Psych Central

  4. Schizophrenia Symptoms: Positive and Negative Symptoms - WebMD

  5. Schizophrenia - World Health Organization (WHO)

  6. Schizophrenia: Definition, Symptoms, Causes, Diagnosis, Treatment - WebMD

  7. Schizophrenia: What It Is, Causes, Symptoms & Treatment - Cleveland Clinic

  8. Symptoms - Schizophrenia - NHS

  9. Schizophrenia - National Institute of Mental Health (NIMH)

  10. Psychiatry.org - What is Schizophrenia?