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  • Title: [The concept of vitality and the Ries biological index].
    Author: Beier W.
    Journal: Z Gerontol; 1985; 18(6):353-7. PubMed ID: 4096079.
    Abstract:
    Using the concept of vitality a relation between the inverse vitality and the Ries biological index is derived. It is shown that the parameter beta of the model I can be calculated from the exponent alpha of the biological index.
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