Studies included in Systematic Review, No. (%)
Research Design Cancer Cardiovascular Diabetes DNA/blood sampling Epidemiology Genetic/genomic testing Health-related HIV Medical Various Overall
Mixed-methods  -  - - - - 1 (3%) - - - 1 (3%) 2 (5%)
Qualitative 9 (24%) 3 (8%) 1 (3%) 4 (11%) 1 (3%) 10 (26%) 1 (3%) 1 (3%)  - 30 (79%)
Quantitative  - 1 (3%)  -  -  - 2 (5%) 2 (5%)  - 1 (3%)  - 6 (16%)
Overall 9 (24%) 4 (11%) 1 (3%) 4 (11%) 1 (3%) 13 (34%) 3 (8%) 1 (3%) 1 (3%) 1 (3%) 38