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The percentage (mean and 95% confidence interval [CI]), of active pharmaceutical ingredient (API), as measured by high-performance liquid chromatography (HPLC), for artesunate tablets, sold alone as monotherapy (black) (N = 29), and co-blistered with mefloquine (grey) (N = 204). The proportion of samples that fell within the 85–115% API boundary is outlined by a dashed line.
