In the article entitled “Evaluation and Refinement of Euthanasia Methods for Xenopus laevis” (Torreilles SL, McClure DE, Green SL. 2009. J Am Assoc Lab Anim Sci 48:512-516), errors were found in the concentrations. They should have appeared as follows:
Page 512, second column, second paragraph:
Line 13: instead of “In our clinical experience, doses of MS222 commonly used for immersion (250 to 500 mg/L) or intracoelomic injection (200 mg/L)”, it should read “intracoelomic injection (200 mg/kg)”.
Line 18: instead of “at concentrations of 1, 2, 3, and 5 mg/L” it should read “at concentrations of 1, 2, 3, and 5 g/L”.
Page 513, first column, Materials and Methods section, under Immersion in MS222 paragraph:
Line 2: Instead of “to test each dose level (1, 2, 3, and 5 g/kg)”, it should read “to test each dose level (1, 2, 3, and 5 g/L)”