Fig. 2From: Emerging trends and focus of human gastrointestinal microbiome research from 2010–2021: a visualized studyThe country co-occurrence knowledge map of the human gastrointestinal microbiome during 2010–2021. Nodes show in the form of annual rings that the annual ring width represents how many papers the country/region publishes in a given year. The more papers are published, the wider the annual ring is in that year [28]Back to article page