Staging was carried out based on the tumour node metastasis technique [18]. For statistical function, instances ended up lumped into two groups: early stage—which include phases I and II and advanced phase—which includes stages III and IV. AG-ch? l?c: S?nh này là s?nh dành cho nh?ng ??i lý hay h?i viên gi?i thi?u b?n ch?i ???c ?u tiên t?