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Principal component analysis (PCA) correlation matrix for Non-Responders.
| Variables | PC1 | PC2 |
| PTHrP | –0.352 | –0.250 |
| ACAN | 0.107 | 0.937 |
| COL1A2 | 0.932 | 0.022 |
| COL2A1 | 0.761 | 0.341 |
| COL10A1 | 0.846 | 0.282 |
| SOX9 | 0.353 | 0.798 |
| IHH | 0.687 | 0.528 |
| MMP13 | –0.311 | –0.807 |
| ALPL | 0.680 | 0.559 |
| 1D1 | –0.508 | –0.449 |
Extraction method: principal component analysis. Rotation method: Varimax with Kaiser normalization.
