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Traditional classification of breast cancer subgroups.
| Classification | Expression | Distribution (%) |
|---|---|---|
| Luminal A | ER/PR+, HER2− | ~65 |
| Luminal B | ER/PR+, HER2+/− | ~15 |
| HER2-type | ER/PR−, HER2+ | ~5 |
| Triple-negative | ER/PR−, HER2− | ~15 |
According to [3, 5, 8] (http://ww5.komen.org/BreastCancer/SubtypesofBreastCancer.html).
