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前列腺癌究竟由什么因素引起,到目前为止,尚不清楚.过去,人们认为它只是人类的一种疾患.但是,Ruddock和Wills发现某些狗有前列腺鳞状细胞癌;
What causes prostate cancer, and so far it is not yet clear, is thought to be a human condition in the past, but Ruddock and Wills found that some dogs have prostate squamous cell carcinoma,