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Timeline of the breast cancer treatment stages and the cross‐sectional and longitudinal time points of data assessment. The “CT‐group” consists of patients indicated for chemotherapy and if necessary, radiotherapy and/or endocrine therapy. The “no‐CT group” consists of patients indicated for radiotherapy and/or endocrine therapy. CT, chemotherapy; ET, endocrine therapy; FU, follow up; N, number of patients; RT, radiotherapy
