Table 4.

Information on the citation network of the 9 main groups.

Main Cluster	Number of Publications	Number of Citation Links	Number of Citations Median (Range)	Number of Publications with ≥4 Citations	Number of Publications in the 100 Most Cited Publications
Group 1	4121	15,544	0 (706–0)	2214	82
Group 2	2481	6424	0 (269–0)	439	5
Group 3	960	1990	0 (57–0)	459	1
Group 4	835	1220	0 (186–0)	306	4
Group 5	524	1454	0 (100–0)	192	5
Group 6	519	1206	0 (89–0)	275	2
Group 7	369	933	1 (55–0)	137	1
Group 8	149	167	0 (16–0)	141	0
Group 9	140	199	0 (22–0)	139	0