TABLE 6.

Top 10 largest clusters of co-cited references.

Cluster ID	Top terms	Size	S-value	Mean (year)
#0	Calciprotein particles	125	0.829	2016
#1	Transcatheter aortic valve replacement	116	0.977	2013
#2	Calcific aortic valve disease	103	0.933	2011
#3	Fibroblast growth factor 23	96	0.908	2010
#4	Vascular smooth muscle cells	81	0.886	2009
#5	Atherosclerosis	75	0.903	2013
#6	Pyrophosphate	64	0.897	2011
#7	Vitamin d	63	0.918	2007
#8	Vitamin k	58	0.919	2009
#9	Sclerostin	44	0.849	2013