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An example from Mexican men aged 20–24 and 30–34 years in the 2012 survey: (a) histograms of observed BMI distributions and estimated BMI density curves with the Box–Cox power exponential (BCPE), log-normal and normal distributions; (b) quantile–quantile plots from the BCPE, log-normal and normal distributions. Vertical and horizontal dashed lines show the cut-offs for BMI categories of underweight, normal, overweight and obesity
