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Gender- and race/ethnicity-specific trend in age-adjusted prevalence of overweight and obesity combined (BMI ≥ 25), obesity (BMI ≥ 30), grades 2 and 3 obesity combined (BMI ≥ 35), and grade 3 obesity (BMI ≥ 40) among US adults aged 20 years and older: NHANES 1999-2000 to 2011-2012.
