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BACKGROUND Concentrated Gegen Tang (GT) granule is a widely available traditional Chinese medicinal product for the treatment of cold and flu. There was no reliable analytical method available for the quality assessment of GT granules. METHODS An HPLC method with an Agilent Zorbax SB-Phenyl Stablebond column (250 x 4.6 mm, 5 microm) was developed and(More)
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