StatisticalMean +-S.D. Evaluation p < 0.01 p < 0.01 Group 1 Control 4.965 2 0.391 Group 2 DDT 5.592 5 0.371 Group 4 DDT + ovalbumin 5.846 -+ 0.373 Group 3 Ovalbumin 5.260 2 0.
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Wassermann et al. (1969) studied this question.
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