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The PPV of NRP coding of the Charlson conditions was consistently high.
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Sandra Kruchov Thygesen
Christian Fynbo Christiansen
Steffen Christensen
SHILAP Revista de lepidopterología
BMC Medical Research Methodology
Boston University
Aarhus University Hospital
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Thygesen et al. (Sat,) studied this question.
www.synapsesocial.com/papers/69d5708775589c71d767dceb — DOI: https://doi.org/10.1186/1471-2288-11-83