Zhai H, Bergstrom JR, Zhang J, Dong W, Wang Z, Stamatopoulos K, Cowieson AJ. Use of fixed calcium to phosphorus ratios in experimental diets may create bias in phytase efficacy responses in swine. Transl Anim Sci. 2022 Aug 29;6(3):txac124; doi: 10.1093/tas/txac124
