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The timing of yogurt given: Gr. A: the yogurt was fed daily in 1st to 4th week. Gr. B: the yogurt was fed from 5th to 8th week. Gr. C: the yogurt was fed since 17th week to the point of sacrifice. Gr. D: the yogurt was fed since 5th week to the point of sacrifice. Gr. E: the yogurt was not given. The animals were sacrificed on the 52th experimental week.
