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Criteria for evaluating microglial activation status.
| Score | Ibal expression | Morphology |
|---|---|---|
| 0 | 0 microglial with expression | No microglial with activated ameboid shape |
| 1 | 1–19 microglial with expression | 1–40% of Ibal positive microglial with ameboid shape |
| 2 | 20–39 microglial with expression | 40–90% of Ibal positive microglial with ameboid shape |
| 3 | >40 microglial with expression | >90% of Ibal positive microglial with ameboid shape |
