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'concentrations': [61], 'cannot': [62], 'be': [63], 'solely': [65], 'Aphanizomenon': [67, 153, 230], 'flos-aquae,': [68, 233], 'only': [70], 'known': [71], 'producer': [73, 267], 'Germany.': [75, 102], 'Therefore,': [76], 'we': [77], 'attempted': [78], 'identify': [80], 'toxin,': [82], 'ATX,': [83, 120], 'producers': [86], 'isolating': [88], 'characterizing': [90], '92': [91], 'Aphanizomenon,': [93], 'Anabaenopsis': [95, 237], 'strains': [96, 108, 155, 187, 200, 224], 'from': [97, 156, 188, 201], 'five': [98], 'In': [103], 'a': [104, 264], 'polyphasic': [105], 'approach,': [106], 'all': [107], 'were': [109, 243], 'morphologically': [110], 'phylogenetically': [112], 'classified': [113], 'then': [115], 'tested': [116], 'for': [117, 136], 'liquid': [124], 'chromatography-tandem': [125], 'mass': [126], 'spectrometry': [127], '(LC-MS/MS)': [128], 'enzyme-linked': [130], 'immunosorbent': [131], 'assay': [132], '(ELISA)': [133], 'screened': [135], 'presence': [138], 'toxin-': [141], 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