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Figure 2 Kaplan-Meier survival curves event free of cardiac death in patients with negative and positive DOB. In patients with positive DOB, progressive worse survival is identified with positivity after high dose and low dose, whereas patients with positivity after atropine have a survival comparable to, or even better than, patients with DOB negativity (p = NS among all groups). Cardiac death (n = 18); follow-up 38 ± 21 months.
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