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Median dietary iodine intake by socioeconomic status (SES) quintiles; 2011–2012 National Nutrition and Physical Activity Survey (N = 7735), Socioeconomic Index For Areas (EIFA) index 2011 of relative socio-economic disadvantage quintile 1 = most disadvantaged, quintile 5 = least disadvantaged [29], Error bars show Interquartile Range.
