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  • Title: Fractional intestinal absorption and retention of calcium measured by whole-body counting. Application of a power function model.
    Author: Nielsen SP, Bärenholdt O, Munck O.
    Journal: Scand J Clin Lab Invest; 1975 May; 35(3):197-203. PubMed ID: 807965.
    Abstract:
    By application of a power function model, fractional intestinal calcium absorption was investigated with a new technique involving whole-body counting after successive oral and intravenous administration of standard doses of 47Ca. The fractional calcium retention 7 days after the oral load of 47Ca was also measured. Fractional calcium retention averaged 30.3% in normal subjects and 11.5% in 11 patients with intestinal malabsorption. In the same groups fractional calcium absorption averaged 46.6% and 16.4%, respectively. Fractional calcium retention and intestinal calcium absorption were significantly correlated to body surface area, and there was a well-defined relation between fractional retention and absorption of calcium...
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