. 2021 Jun 3;11:687432. doi: 10.3389/fonc.2021.687432
Copyright © 2021 Crisafulli, Bertino, Fontana, Calapai, Ingrasciotta, Berretta, Trifirò and Guarneri
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Figure 1.
PRISMA flow-chart showing the process of literature search and study selection.