Trend of robot-assisted surgery system in gastrointestinal and liver surgery: A bibliometric analysis

Table 3 Keywords with the occurrence more than 10

Keywords	Year of first occurrences	Frequency	Centrality
Robotic surgery	2007	95	0.14
Rectal cancer	2013	76	0.34
Resection	2011	68	0.06
Surgery	2010	57	0.06
Outcome	2010	46	0.21
Laparoscopic surgery	1997	43	0.11
Learning curve	2012	42	0.51
Total mesorectal excision	2011	42	0.29
Minimally invasive surgery	2007	33	0.2
Colorectal surgery	2009	32	0.04
Meta analysis	2014	27	0.11
Gastric cancer	2012	27	0.06
Cancer	2007	26	0.38
Short term outcome	2013	23	0.1
Experience	2007	22	0.23
Complications	2014	22	0.17
Colorectal cancer	2016	21	0
Robot-assisted surgery	2005	19	0.08
Low anterior resection	2012	18	0.02
Trial	2011	17	0.06
Impact	2016	15	0.03
Survival	2019	15	0.02
Lymph node dissection	2010	14	0.08
Multicenter	2005	13	0.23
Colon cancer	2018	10	0.04
Classification	2015	10	0