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PRISMA 2020 flow chart diagram for systematic reviews. AD, Alzheimer’s disease; MS, multiple sclerosis. * From the 165 papers, 55 raised doubts for inclusion after full-text assessment. These papers were double-checked by all the authors. In the end, 19 papers were included after reaching a consensus, while the remaining 36 were excluded. Illustration adapted from Page et al., 2021 (42).
