PhD Dissertation on Glutathione Deficiency in PD: https://pdfs.semanticscholar.org/7656/46c3233cfb3ff5698992b1f09ae9102ddbd1.pdf

MPH Thesis on Lithium Deficiency in PD: https://digital.lib.washington.edu/researchworks/bitstream/handle/1773/23725/Mischley_washington_0250O_11918.pdf?sequence=1

Phase I/IIa Study of Intranasal Glutathione in PD: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4609266/

Phase IIb Study of Intranasal Glutathione in PD: https://www.ncbi.nlm.nih.gov/pubmed/28436395

CNS Uptake of Intranasal Glutathione in PD: https://www.ncbi.nlm.nih.gov/pubmed/28725693

Role of Diet & Nutritional Supplements in PD: https://www.ncbi.nlm.nih.gov/pubmed/29081890