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A: Curves showing time course of increase in circumference of rat knees that received either, injection of zymosan alone, or injection of zymosan with five daily illuminations with 810-nm laser light of 30 J/cm2 both delivered at either 5 mW/cm2 or 50 mW/cm2. B: Mean of areas under the curve for individual time courses of knee circumference. LLLT effect is significantly better at low irradiance of 5 mW/cm2.
