Table 2.

Q1 keyword nodes ranked by co-occurrences (HR keywords highlighted).

Rank	Keyword	Co-occurrences
1	Ethics	179
2	Research Ethics	168
3	Informed Consent	151
4	Clinical Trials	99
5	Health	63
6	Challenges	60
7	Consent	57
8	Risks	54
9	Trials	52
10	Clinical Research	50
11	Bioethics	45
12	Care	45
13	Children	42
14	Ethics Committees	42
15	Vulnerability	41
16	CoViD-19	38
17	Participation	32
18	Guidelines	31
19	Research	30
20	Issues	27
21	Public Health	27
22	Health-Care	26
23	Adolescents	25
24	Community Engagement	25
25	Women	25
26	HIV	24
27	Pregnancy	24
28	Privacy	24
29	Interventions	23
30	Prevalence	23
31	Experiences	22
32	Governance	22
33	Access	21
34	Health Research	21
35	Safety	21
36	Data Sharing	20
37	Decision Making	20
38	Vaccines	20
39	Developing Countries	19
40	Biomedical Research	18
41	Capacity	18
42	Framework	18
43	Management	18
44	People	18
45	Benefits	17
46	Disease	17
47	Outcomes	17
48	Participants	17
49	Quality	17
50	Africa	16
51	Impact	16
52	Policy	16
53	Prevention	16
54	Qualitative Research	16