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Representative ion-chromatograms of (A) double blank plasma (without ergocalciferol and ergocalciferol-d6) (B) blank plasma with ergocalciferol-d6, (C) ergocalciferol at LLOQ and ergocalciferol-d6, (D) ergocalciferol at ULOQ and ergocalciferol-d6, (E) subject sample at Cmax after administration of 1.25 mg dose of ergocalciferol.
