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Concentration of atropine sulphate in aqueous humor for atropine 0.01% formulation with BAC (red) vs. preservative-free formulations. The bars within the box plots represent the median values, the edges represent the 25th/75th percentiles, and the whiskers extend from the ends of the boxes to the outermost data points within the quartile—1.5× of the interquartile range.
