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Comment
. 2011 Nov 16;306(19):2096-7; author reply 2097.
doi: 10.1001/jama.2011.1662.

Cross-level bias and variations in care

John W Finney, Keith Humphreys, Alex H S Harris
Comment

Cross-level bias and variations in care

John W Finney et al. JAMA. .
No abstract available

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