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    Changes of serum copper and zinc levels in patients with nasopharyngeal carcinoma by radiotherapy

    Serum copper levels (SCL) and serum zinc levels (SZJ) were evaluated in 128 patients with nasopharyngeal carcinoma (NPC) of varying stages before, during, and after radiotherapy, and then compared with normal ...

    Hsue-Yin Hsu, Shan-Yeh Lin, Chih-Jen Huang in Biological Trace Element Research (1994)