Web of Science is a platform consisting of several literature search databases designed to support scientific and scholarly research.
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The Web of Science ResearchID is a unique identifier and can be used on Web of Science, Publons, EndNote and InCites.
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Publons is the new environment where you can benefit from the improved Web of Science ResearcherID, add your publications, track your citations, and manage your Web of Science record.
Source: ResearchID page