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Plasma endotoxin concentration during endotoxin infusion (4 μg/kg per hour during 30 min followed by 1 μg/kg per hour until the end of experiment). Time 0 = start of endotoxin infusion. The values obtained at time 0 have been set to zero. In the saline and the tobramycin groups n = 4. In the ceftazidime group n = 5 at 1, 2, 3 and 4 hours; thereafter n = 4. SE, standard error.
