Machine learning in solid organ transplantation: Charting the evolving landscape

Figure 2 The network visualization of the top contributing countries and their interconnections. Each circle represents a country, and the size of the circles indicates the frequency of occurrence. Larger circles indicate that the country publishes more frequently. Countries included in the same cluster, which occurred frequently together, are displayed in the same color. The distance and line thickness between two circles represent the degree of the relationship between countries.