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. 2012 May 23;7(5):e37883. doi: 10.1371/journal.pone.0037883

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Lever et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Median NT-proBNP concentrations of deciles of gender-corrected plasma betaine concentrations; trend (quadratic regression) and 95% confidence intervals shown (p<0.001).