Hotspots and trends in stem cell therapy for liver fibrosis and cirrhosis: A bibliometric analysis

Table 4 Top 20 most frequent keywords

Rank	Count	High frequency keyword	Year	Centrality
1	411	Mesenchymal stromal cell	2004	0.04
2	368	Liver fibrosis	2004	0.04
3	360	Cirrhosis	2005	0
4	322	Transplantation	2005	0.04
5	270	Stem cell	2005	0.01
6	211	Differentiation	2004	0.1
7	190	Hepatic stellate cell	2006	0.01
8	184	Stromal cells	2008	0
9	179	Bone marrow	2005	0
10	176	Therapy	2004	0.13
11	164	Fibrosis	2008	0
12	159	Expression	2004	0.06
13	146	Regeneration	2004	0.04
14	135	Cell therapy	2006	0.02
15	122	In vitro	2006	0.09
16	117	Mouse	2006	0
17	110	Progenitor cells	2006	0.01
18	106	Injury	2011	0
19	104	Disease	2006	0.05
20	102	Hepatocytes	2004	0.09