Average hair density (A, B) and thickness (C, D) during follow‐up.
Abbreviations: AC, doxorubicin, cyclophosphamide; FAC, fluorouracil, doxorubicin, cyclophosphamide; T1, before chemotherapy; T2, after two cycles of chemotherapy; T3, 1 month after completion of chemotherapy; T4, 3 months after completion of chemotherapy; T5, 6 months after completion of chemotherapy; T6, 3 years after completion of chemotherapy.