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Title
Differences in physical activity prevalence and trends from 3 U.S. surveillance systems: NHIS, NHANES, and BRFSS.
Authors
Carlson, Susan A; Densmore, Dianna; Fulton, Janet E; Yore, Michelle M; Kohl, Harold W, 3rd
Abstract
Three U.S. surveillance systems-National Health Interview Survey (NHIS), National Health and Nutrition Examination Survey (NHANES), and Behavioral Risk Factor Surveillance System (BRFSS)--estimate physical activity prevalence.