Points: Parathyroid hormone and 25-hydroxyvitamin D concentrations in elderly peopleBr Med J (Clin Res Ed) 1983; 287 doi: https://doi.org/10.1136/bmj.287.6404.1555-a (Published 19 November 1983) Cite this as: Br Med J (Clin Res Ed) 1983;287:1555
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