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Mean serum PGE2 levels taken from rats 24 hours after they received either: no treatment, zymosan alone, zymosan+dexamethasone, zymosan+an ineffective light regimen (3 J/cm2 at 50 mW/cm2), zymosan+an effective light regimen (3 J/cm2 at 50 mW/cm2). Values are means of six independent determinations of aliquots from serum pooled from three rats per group and bars are SD.
