Ung thư gia tăng ở các nước thu nhập thấp
Cập nhật: 07:50 17/12/2015 GMT+7
Trong khi tỷ lệ mắc và tỷ lệ tử vong vì một số loại ung thư ở các nước thu nhập cao có chiều hướng đi xuống, thì ở nhiều nước thu nhập thấp và trung bình, ung thư đang gia tăng.
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