Staging was done based on the tumour node metastasis process [18]. For statistical function, cases had been lumped into two groups: early stage—which include levels I and II and State-of-the-art stage—such as phases III and IV. Có th? ?ánh giá ???c r?ng t? l? c??c t?i nhà cái luôn h?p d?n và có tính c?nh tranh trên t?t c? các nhà c