High nuclear phosphorylated extracellular signal-regulated kinase expression associated with poor differentiation, larger tumor size, and advanced stage of breast cancer

Hsing Tao Kuo, Hui Ting Hsu, Chun Chao Chang, Ming Chung Jiang, Chung Min Yeh, Ko Hung Shen, Pei Chi Hsu, Cheng Jeng Tai