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Relationship between unadjusted 4β‐hydroxycholesterol levels (4βOHC, nmol l−1) and 4βOHC‐to‐cholesterol (C) ratios (4βOHC/C) in the 86 patients where residual sample volumes were sufficient for reanalysis of both 4βOHC and C. P‐value estimated by Spearman's rank correlation test (r [rho] = correlation coefficient)
