Global trends of purinergic receptors and depression: A bibliometric analysis from 2003 to 2023

Figure 3 Cooperation between countries. A: World map of the intensity of cooperation between countries; B: Circle diagram of international collaboration between countries. In these two visual maps, each node is a country, and the links between countries represent cooperative relations. The size of each node is proportional to the total number of publications. The red nodes indicate that there are more cooperative publications between the country and other countries, while the thicker connecting lines between the nodes indicate that the cooperation between the two countries is closer.