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Comparative analysis shows that authors tend to choose broader-term labels when manually reading and analyzing cited references to a cluster,whereas algorithmically chosen terms from citing items tend to be more specific and narrowed.Combined with author co-citation analysis using WoS data,co-authorship analysis using data from PubMed and co-words analysis of both WoS descriptors and identifiers using CiteSpace,we discover that mental health literacy and functional health literacy are two separated research areas in health literacy research and practice.Another two most active areas of research in recent years are also indentified.