Table 6.

Top 20 most frequent keywords.

Rank	Keyword	Occurrences	Cluster
1	Stroke	469	1
2	COVID-19	452	1
3	Coronavirus	87	3
4	Pandemic	81	2
5	Thrombectomy	78	2
6	Risk factors	66	1
7	Care	57	2
8	Thrombolysis	53	2
9	Infection	44	3
10	Management	43	2
11	Outcomes	43	1
12	Therapy	30	2
13	Mortality	29	1
14	Cerebrovascular	28	2
15	Epidemiology	23	1
16	Guidelines	20	2
17	Inflammation	19	3
18	Thrombosis	19	2
19	Times	19	2
20	Impact	18	1