HER2−/ER+/PR− cases serum E2, E2/SHBG and E1S/E1 ratios showed significant or nearly significant trend.
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Serum estrone concentration, estrone sulfate/estrone ratio and BMI are associated with human epidermal growth factor receptor 2 and progesterone receptor status in postmenopausal primary breast cancer patients suffering invasive ductal carcinoma.
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