| PI3K | phosphatidylinositol-3 kinase |
| EGF | epidermal growth factor |
| HR | hormone receptor |
| ER | estrogen receptor |
| LTED | long-term estrogen deprivation |
| AI | aromatase inhibitor |
| PFS | progression free survival |
| AE | adverse event |
| G | grade |
| MBC | metastatic breast cancer |
| MTD | maximum tolerated dose |
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