Fig. 3

Visual maps of academic collaboration between countries/regions, institutions, journals, and authors by VOSviewer. A Co-authorship between countries/regions (threshold = 5). B Co-authorship between institutions (threshold = 11). C Co-authorship between journals (threshold = 15). D Co-authorship between authors (threshold = 5). E Co-citation between journals (threshold = 416). F Co-citation between authors (threshold = 62)