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mRNA expression in the left ventricle of BNP (A), collagen 1A1 (B), collagen 1A2 (C), and collagen 3A1 (D) was quantified in ZSF1‐lean (black bars) and ZSF1‐obese (grey bars) rats at different ages. Expression values are expressed as x‐fold change vs. ZSF1‐lean animals and shown as mean ± SEM. * P < 0.05, ** P < 0.01, *** P < 0.001 vs. ZSF1‐lean.
