Table 1.

Publications in the 10 most productive countries/regions.

Rank	Country/Region	Np	% of (756)	Nc	Na	H-Index
1	China	327	42.58	6217	19.01	41
2	USA	270	35.16	9816	36.36	48
3	Germany	40	5.21	999	24.98	17
4	Canada	39	5.08	2019	51.77	24
5	England	35	4.56	1694	48.40	19
6	Italy	33	4.30	1148	34.79	21
7	France	29	3.78	977	33.62	16
8	Japan	21	2.73	486	23.14	13
9	India	20	2.60	338	16.90	8
10	South Korea	17	2.21	679	39.94	13