Quantification of secretory IgA and mucin excretion and their contributions to total endogenous amino acid losses in roosters that were fasted or precision-fed a nitrogen-free diet... von Parsons, B.W., Drysdale, R.L., Cvengros, J.E., Utterback, P.L., Rochell, S.J., Parsons, C.M., Emmert, J.L.

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