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Table 1 Top 10 funding sources

From: Emerging trends and hotspot in gut–lung axis research from 2011 to 2021: a bibliometrics analysis

Ranking Funding source Country/region Frequency
1 United States Department of Health and Human Services United States 591
2 National Institutes of Health United States 588
3 National Natural Science Foundation of China China 300
4 European Commission Europe 186
5 National Heart, Lung, and Blood Institute United States 159
6 National Institute of Allergy and Infectious Disease United States 152
7 National Cancer Institution United States 129
8 National Institute of Diabetes and Digestive and Kidney Diseases United States 103
9 Ministry of Education, Culture, Sports, Science and Technology Japan 89
10 Japan Society for the Promotion of Science Japan 84