Table 4.

Cluster summary (19 clusters by size, 2001–2021).

ClusterID	Label (LLR)*	Size	mean(Year)
0	cell	49	2011
1	virus infection	44	2013
2	tract infection	43	2016
3	d supplementation	41	2011
4	pregnancy	41	2013
5	aids	40	2010
6	vdr	40	2011
7	hiv	40	2010
8	tuberculosis	37	2008
9	virus	36	2011
10	d deficiency	36	2012
11	inflammatory bowel disease	35	2013
12	d receptor	32	2006
13	iron	30	2012
14	dendritic cell	30	2005
15	safety	30	2010
16	covid-19	23	2016
17	sustained virological response	14	2013
18	ifn gamma	9	2004

^*Only the first keyword of per cluster is listed.