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Trend of post-lumpectomy radiation therapy over time in patients with invasive breast cancer who received lumpectomy (A), patients with ductal carcinoma in situ (B), and patients aged 50 years or older with pT1-2N0 breast cancer, without prior chemotherapy (C). APBI, accelerated partial breast irradiation; CF-WBI, conventional fractionated whole breast irradiation; HF-WBI, hypofractionated whole breast irradiation.
