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  1. Excluded References - Interventions to Prevent Age-Related Cognitive Decline, Mild Cognitive Impairment, and Clinical ... 
    https://www.ncbi.nlm.nih.gov/books/NBK442416
    ... A combination of green tea extract and l-theanine improves memory and attention in subjects with mild ... Comparative Effectiveness Reviews, No. 188.) Appendix D, Excluded References. PDF version of this title (7.8M) Other ...
  2. References for Appendixes C–G - Nutrition as Prevention for Improved Cancer Health Outcomes - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK592520
    ... Oral administration of the amino acids cystine and theanine attenuates the adverse events of S-1 adjuvant ... May. (Comparative Effectiveness Review, No. 260.) Appendix H, References for Appendixes C–G. PDF version of this ...