Select the Appropriate Population for Adding CDK4/6i to Neoadjuvant Endocrine Therapy
Status: RECRUITING
Study type: INTERVENTIONAL
Conditions: Locally Advanced Breast Cancer|Hormone Receptor Positive，HER2-negative Breast Cancer
Interventions: DRUG: letrozole
Sponsor: Yongsheng Wang
Collaborators: Jiangsu HengRui Medicine Co., Ltd.