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Variation of feed intake (A), albumen height (B) and Haugh unit of fresh eggs (C) from Japanese quails fed different levels of vitamin E (VE, 30 or 120 mg kg−1) and Se sources (SS, sodium selenite; SP, Sel-Plex) over a period of eight weeks. Values (means ±SEM) within the same week with uncommon letters are significantly (p < 0.05) different.
