Comprehensive bibliometric analysis of pharmacotherapy for bipolar disorders: Present trends and future directions

Figure 2 Analysis based on countries/regions. A: Network visualization of global research collaboration; B: Network visualization of national collaboration; C: Network visualization of author collaboration; D: Network visualization of institutional collaboration. The nodes represent countries, authors, or institutions, with node size indicating the number of publications. The thickness of the connecting lines reflects the strength of collaboration between countries, authors, or institutions. Different colors denote distinct clusters.