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Start Over Subjects Powders ✖Remove constraint Subjects: Powders Titles The application by insufflation of medicated powders to the upper air passages for the relief of catarrhal conditions ✖Remove constraint Titles: The application by insufflation of medicated powders to the upper air passages for the relief of catarrhal conditions

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  • The application by insufflation of medicated powders to the upper air passages for the relief of catarrhal conditions1