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To evaluate the potential effect of estrogens in premenopausal female thyroid cancer, the concentrations of 14 estrogens were quantitatively determined in the urine of pre- and post-operative patients with thyroid papillary cancer (18 patients case, 26~54 years) and normal female subjects (20 cases, 31~52 years). The highly sensitive gas chromatography-mass spectrometry-selected ion-monitoring method...
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