Table 1.

The five countries with the highest number of publications.

Country	Publications (%)	Centrality	Degree	Half-Life
The United States	225 (31.18%)	0.40	38	5.5
China	208 (28.57%)	0.02	19	6.5
England	113 (15.52%)	0.12	33	5.5
Australia	107 (14.70%)	0.19	33	5.5
Singapore	53 (7.28%)	0.05	25	5.5