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Keywordsand research trends. (A) 6 clusters of the top 85 keywords with the most occurrences on POEMS syndrome publications, (B) a time-series keyword map based on the frequency of co-occurrence, (C) a density keyword map for visualizing co-occurrence, (D) the top 25 keywords with the most robust emergent strength, (E) trend topics mapped by keyword occurrences, (F) thematic graphic for keyword occurrences.
