[Enzymological study of prostatic cancer. I. Changes of serum lactic dehydrogenase, alkaline phosphatase, leucine aminopeptidase, total acid phosphatase, prostatic acid phosphatase, glutamic pyruvic transaminase, glutamic oxalacetic transaminase activity and lactic dehydrogenase isoenzymes in prostatic cancer under anti-androgenic treatment, with special reference to prognosis].