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. 2018 Jun 29;6:e5091. doi: 10.7717/peerj.5091

Figure 5. Correlations between the publication number of bariatric intestinal microbiota in obesity research and (A) GDP (r = 0.89, p < 0.0001), (B) HDI (r = 0.32, p < 0.001), (C) PN (r = 0.27, p < 0.05), and (D) PPP (p = 0.08).

Figure 5

Abbreviations: GDP, gross domestic product; HDI, human development index; PN, population number; PPP, purchasing power parity (gross domestic product per capita).