A Study to Evaluate Ethanol-induced Symptoms and Safety in Breast Cancer Patients

Inclusion Criteria: * Those who voluntarily signed a written personal information collection and usage agreement after receiving an explanation about the objective and method, etc. of this clinical study. * Those are confirmed to have primary breast cancers through histological diagnosis and one of the following are applicable. * Those who need neoadjuvant chemotherapy as breast cancer patients * Those who need adjuvant chemotherapy after breast cancer surgery * Those who are scheduled to administer non-ethanol formulation docetaxel according to chemotherapy * Those able to understand this study, be cooperative in the execution of the study, and participate in the study until its completion. Exclusion Criteria: * Those are diagnosed with other primary cancer that can influence the treatment or prognosis of primary breast cancers. * Those are diagnosed with secondary breast cancers. * Those with Stage 0/1 (Tis, N0, M0) or Stage IV (any T, Any N, M1) breast cancers.