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Calibration for isotope dilution mass spectrometry : description of an alternative to the bracketing procedure
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Determination of reference method values for serum aldosterone, cortisol, 17ß-estradiol, progesterone, testosterone, thyroxine and theophylline by isotope dilution gas chromatography-mass spectrometry : a five years' experience of two European laboratories
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Determination of reference method values for serum cholesterol, creatinine, glucose, triglycérides and uric acid by isotope dilution gas chromatography-mass spectrometry : a five years' experience of two European laboratories