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Figure 2 Bar graph comparing the ratios of transcardiac spillover rates for dihydroxyphenylalanine to norepinephrine (DOPA:NE SR), dihydroxyphenylglycol to norepinephrine (DHPG:NE SR) and tritium-labeled dihydroxyphenylglycol to norepinephrine (³H DHPG:NE SR) for nontreated (A–) and treated patients (A+). **p < 0.05.

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