Serum glutathione peroxidase, xanthine oxidase, and superoxide dismutase activities and malondialdehyde levels in patients with Parkinson's disease Neurological Sciences Springer Nature Link Parkinson's Disease Treatment IV Glutathione for Parkinson's Parkinson's Disease: Cells Succumbing to Lifelong Dopamine Related Oxidative Stress and Other Bioenergetic Challenges Frontiers Riboflavin Has Neuroprotective Potential: Focus on Parkinson's Disease and Migraine Randomized, double'blind, pilot evaluation of intravenous glutathione in Parkinson's disease