Figure 8 (A) Keyword emergence diagram for external lateral epicondylitis. In the graph, “” is a 1-year keyword marker and “” is the year of occurrence of the highlighted word. (B) Co-cited literature network for lateral epicondylitis. The circles in the graph represent cited literature (showing the first author’s name), with larger circles indicating more citations. The connecting lines represent co-citations among the literature, and the thickness of the purple outer circle represents the centrality of the literature. (C) Clustering of co-cited literature for lateral epicondylitis. The circles in the diagram represent keywords. The larger the circle, the more frequently the keyword appears. The grey to colored represents the years from far to near, the connecting lines represent the links between keywords, the thickness of the outer purple circle represents the centrality of the keyword. This diagram is arranged in chronological order by clustering colors from light to dark. (D) Key literature on the emergence of lateral epicondylitis. The figure “” shows the year of the appearance of the emergent citation, and the figure “” shows the nodes where the number of citations for the emergent citation suddenly increased, in chronological order from top to bottom.