Eighty pairs of BC tissues and paracarcinoma tissues were harvested from patients diagnosed as BC in the First Affiliated Hospital of Chongqing Medical University (Chongqing, China). None of these BC patients received preoperative chemotherapy or radiotherapy. Before RNA extraction, the tissue samples were retained in liquid nitrogen. The present investigation was conducted in accordance with the ethical standards and the Declaration of Helsinki and approved by the Ethics Committee of Chongqing Medical University (No. 2022-K228). Informed consent from the patients has been obtained.
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