Probiotic, Prebiotic, or Synbiotic Supplementation in Parkinson's Disease: A Systematic Review and Meta-Analysis with Trial Sequential Analysis. - Cabanillas-Lazo, Miguel; Pascual-Guevara, Milagros; Chavez-Ecos, Fabian A.; Alva-Diaz, Carlos; Velasquez-Rimachi, Victor; Mori, Nicanor; Micheli, Federico (Gerontology, 2026)