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Plasma counter-regulatory responses in normal human volunteers receiving intravenous endotoxin (LPS, 2 ng/kg) at time 0. (A) Cortisol (hydrocortisone)(n=22). (B) Epinephrine (n=6). Graphs depict mean±standard error. One-way repeated-measures analysis of variance was performed. For cortisol, endotoxin effect was significant at p<0.0001; for epinephrine, effect was significant at p<0.01.
