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What are the Causes of Parkinson's Disease?

The Early Signs of Parkinson's Disease

What is Parkinson's Disease and What Causes this Disease? - Explained by Dr. Berg

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The DOPAMINE Myth

Scientists studying ‘Parkinson’s belt’ believe disease is linked to chemicals 

What causes Parkinson's disease?

Symptoms of Parkinson’s Disease

Understanding the Role of Dopamine in Parkinson's Disease - Yale Medicine Explains

Parkinson's Disease 101 - Kara Wyant, MD