Construction of a nomogram prediction model for the pathological complete response after neoadjuvant chemotherapy in breast cancer: a study based on ultrasound and clinicopathological features - Ni, Pingjuan; Li, Yuan; Wang, Yu; Wei, Xiuliang; Liu, Wenhui; Wu, Mei; Zhang, Lulu; Zhang, Feixue (Frontiers in Oncology, 2025)