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| (A) Thematic map of “Keywords Plus” created by the biblioshiny app (B) Keywords with the strongest currently ongoing citation bursts. The red bars indicate the duration of the burst and reflect keywords cited frequently; in contrast, the green bars indicate keywords cited infrequently. These keywords identified by Citespace were found within the clusters labeled “depression,” “quinolinic acid,” and “cerebrospinal-fluid” in the thematic map.
