Derivation Web

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## One-sentence thesis

The direct receipts support a narrow working claim: the higher all-cause mortality persisted even after adjustment for confounders (hazard ratio 4.14, confidence interval 1.29-13.48); HR for tertile three of Klotho was 2.18 (95% CI 0.91-2.23). The context receipts provide source breadth and boundary checks, not independent confirmation of the l…