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Genetic subgroups based on DRB1*13 and apoE genotypes. There was no participant with the combination {DRB1*13 present, apoE E2/E4}.
| Subgroup | DRB1*13 | ApoE | N |
|---|---|---|---|
| A | 0 | E2/E2, E2/E3 | 15 |
| B | 1 | E2/E2, E2/E3 | 5 |
| C | 0 | E4/E4, E3/E4 | 33 |
| D | 1 | E4/E4, E3/E4 | 10 |
| E | 0 | E2/E4 | 5 |
| F | 0 | E3/E3 | 79 |
| G | 1 | E3/E3 | 31 |
