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Question
6.2.2
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Figure
6.2 Pain Reduction vs. Dose and Plasma Concentration
of Tricyclic Antidepressants in Post-Herpetic
Neuralgia
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Assuming
that there is actually a modestly significant positive dose-
or concentration-response relationship in this study, did
the individual titration of patients’ doses tend to strengthen
or weaken it?
 STRENGTHEN 
WEAKEN
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