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Reduction of Mansonella perstans microfilarial levels after high-dose, twice-yearly albendazole and ivermectin (A), compared with standard-dose, annual treatment (B). Each solid line represents the percentage of pretreatment microfilarial levels for an individual patient over time. The dashed line indicates the 100% pretreatment level. *P<.05, compared with baseline (Wilcoxon-Mann-Whitney U test).
