case_images: PMC4082912_01
case_images: PMC4082912_02
case_images: Charts showing epidemiological data for the US population.
case_images: CRIS2014-126924.002.jpg
case_images: PMC4082912_02_CRIS2014-126924.002.jpg
case_images: fig2
case_images: The reason for the discrepancy is unknown (Figure 2).
case_images: PMC4082912_03
case_images: PMC4082912_04