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Principal component analysis showing the loading for the first 3 extracted components with the amount of total variability explained by each one. Included variables: elastic modulus E, yield stress σ y and strain ε y, ultimate stress σ u and strain ε u, elastic work (EW), postyield work (PYW), tissue mineral density (TMD), collagen cross-links (CCL), carbonate substitution ratio (CPR), and mineral-to-matrix ratio (MMR).
