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FIGURE 1. (A) Mean ± SD of total plasma activity normalized to injected dose [Bq/(mL x MBq ID) after injection of 11C-DASB. Each point is mean of 9 subjects. After a rapid distribution, plasma activity stabilized to a relatively constant level. (B) Mean ± SD of fraction of plasma activity corresponding to parent compound after injection of 11C-DASB. Values are mean of 9 subjects. (C) Mean plasma activity corresponding to parent compound after injection of 11C-DASB. Each point is mean of 9 subjects.