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Effect of testosterone on anemia. Men (top) who were anemic at baseline for no known reason (unexplained) or (bottom) who had a known cause were treated with testosterone or placebo. (Left) The percentage of men who experienced an increase in hemoglobin of ≥1.0 g/dL. (Right) Absolute increases in hemoglobin. Data presented as means ± pointwise confidence intervals. Adapted, with permission, from Roy et al. (37).
