Patients with breast cancer who underwent systemic chemotherapy were assessed with the European Organization for Research and Treatment of Cancer-Chemotherapy Induced Peripheral Neuropathy (EORTC-CIPN20) questionnaire within 1-2 months after completion of systemic chemotherapy. A simple data form was implemented in which patients' age, weight, height, marital status, smoking status, etc were investigated. In addition, the dose of the exposure of systemic chemotherapy was calculated according to the Body Surface Area (BSA) and DuBois formulation as follows: BSA \[m2\] = Weight \[kg\]0.425 × height (cm)0.725 × 0.007184\]. The universal dose calculations were used to calculate the mean exposure according to the following doses for each patient-specific to their chemotherapy regimen: Four cycles of Anthracycline were applied 14 days apart 60 mg/m2 intravenous (IV), 12 cycles of Paclitaxel were applied seven days apart 80 mg/m2 IV, and four cycles of Docetaxel were applied 21 days apart 75 mg/m2 IV.
