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INTRODUCTION: Parkinson's disease (PD) is characterized by progressive dopaminergic neurodegeneration, neuroinflammation, and emerging evidence of gut microbiota dysbiosis. Although nicotine has been implicated in neuroprotection, whether its enantiomers exert stereoselective effects on the gut-brain axis remains unknown.

Vast offshore habitats face threats including mining, trawling, and drilling for oil

Researchers are preparing to launch an unprecedented trial to protect people exposed to Ebola in the DRC and Uganda

Sweeping proposed rule, now open for comments, would also restrict foreign collaborations and remove federal funding for open-access fees