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Median values for N-terminal pro–brain natriuretic peptide (NT-proBNP) and 6-minute walk distance. Patients included had baseline 6-minute walk distances of 100 m to 450 m.
Box edges indicate the 25th and 75th percentiles, the horizontal line inbetween the edges, the median. Whiskers extend to the furthest point with 1.5 × IQR of the box ends.
