Original Article MHAU-Net: A multi-scale hybrid attention U-shaped network for the segmentation of MRI breast tumors Jiayu Yin, Liangsen Liu, Xianting Luo, Wenxiang Shen, Hai Liao, Yixin Lu, Wei Kang, Meihai Xu, Jieqin Wei, Caiyun Huang, Danke Su