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A) Retinol binding protein 4 (RBP4) concentrations in African American individuals harboring TTR V142I (V142I+) are significantly lower than in age-, sex- and race-matched V142I-individuals; B) RBP4 levels are similar in V142I+ individuals regardless of presence/absence of red flag (RF) diagnoses. † P < 0.001; * P < 0.05; n.s. = not significant.
