Comparative long-term oncological outcomes of intraoperative radiotherapy vs. whole-breast irradiation in early breast cancer: a single institute study - Chi, Mau-Shin; Ko, Hui-Ling; Yang, Tsen-Long; Liu, Ya-Fang; Chi, Kwan-Hwa; Cheng, Fiona Tsui-Fen (Frontiers in Oncology, 2024)