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pubmed:abstractText |
Most clinical research in the United States has been carried out in atypical populations. This study, done in a network of primary care populations in Virginia, calculates the denominator by the utilization correction factor method and compares the demography with that of the population of the state. The demographic characteristics of the patients in the network are very similar to those of the underlying populations and on the same order of state-of-the-art sampling methods in current use.
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