A novel nomogram for the preoperative prediction of sentinel lymph node metastasis in breast cancer oleh Xue‐fei Wang, Guo‐chao Zhang, Zhi‐chao Zuo, Qing‐li Zhu, Zhen‐zhen Liu, Sha‐fei Wu, Jia‐xin Li, Jian‐hua Du, Cun‐li Yan, Xiao‐ying Ma, Yue Shi, He Shi, Yi‐dong Zhou, Feng Mao, Yan Lin, Song‐jie Shen, Xiao‐hui Zhang, Qiang Sun