Mapping research trends of transarterial chemoembolization for hepatocellular carcinoma from 2012 to 2021: A bibliometric analysis

Table 2 The top ten countries/regions with the highest productivity

Rank	Country/Region	Np	Nc	Average per item	H-index
1	China	2109	22453	13.17	61
2	United States	1100	31045	30.41	71
3	Japan	746	10739	16.03	46
4	South Korea	595	10605	19.92	49
5	Germany	371	5529	16.04	37
6	Italy	279	9252	34.27	45
7	China Taiwan	244	5330	22.84	34
8	France	190	6609	35.97	35
9	Egypt	120	969	8.72	18
10	England	106	3554	34.74	29

H-index: Hirsch index; Np: Number of papers; Nc: Number of citations.