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Mineral and Electrolyte Metabolism: “Stimulation by citric acid of calcium and phosphorus bioavailability in rats fed a calcium-rich diet regime.”-????? ?? ?????? ??? ???????, ?????, ????????, ?????????? ?? ???????? ???? ??? ????????????? ??? ???? ??? ?? ????? ???? ?? ?? ????? ?? ????? ?????? ???? ???.????????????? ????? ?? ????? – ?????? ??