Figure 1 (A) Network map of co-authors’ countries. Time slicing: January 2010 to September 2021, Slice length: 1 year, Node types: Country, Top N=20, Pruning: Pathfinder and Pruning the merged network, N (nodes)=42, and E (links)=48. (B) Network map of co-cited authors. Time slicing: January 2010 to September 2021, Slice length: 1 year, Node types: Cited author, Top N=20, Pruning: Pathfinder and Pruning the merged network, N=54, and E=61. Above the picture is the timeline with color (2010–2021). The color of a link represents the earliest time slice in which the connection was first made. A node of high betweenness centrality is usually one that connects 2 or more large groups of nodes. A node with a strong betweenness centrality score has a great influence on a network. High betweenness centrality is represented by the thickness of a purple ring. Citation burst is revealed by the presence of red tree rings. The thicker the red tree rings, the more burst for the corresponding node. (Software: CiteSpace 5.7.R5W, Drexel University, Philadelphia, USA).