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. 2012 May 8;89(5):828–847. doi: 10.1007/s11524-012-9689-3

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© The Author(s) 2012

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Figure 7. — Hospital utilization and median household income in California counties. The set of bar graphs on the left illustrates the number of hospital days per 1,000 in low-income ZIP codes (MHIs <$50,000) within eight counties and San-Framento. The middle set illustrates utilization in all ZIP codes in these counties, and the set on the right illustrates utilization in high-income ZIP codes (MHIs >$75,000.)