Fig. 6

The Keyword co-occurrence knowledge map of the human gastrointestinal microbiome during 2010–2021. Each node represents a keyword, and the size of the node represents the frequency of their occurrence, and the line between nodes represents the intensity of co-occurrence, and the color of the line corresponds to the time range at the top of the picture. The frequency of keywords and centrality were listed is in the lower-left corner of the graph [28]