7Bennett J W, Klich M. Serum trace metals in chronic viral hepatitis and hepatocellular carcinoma in Thailand [J], Clinicalmicrobiology,2003,16(3):497-516.
8Poo J L, Romero R R, Montemayor A C, et al. Diagnostic value of the copper/zinc ratio in hepatocellular carcinoma: a case control study [J]. Journal of Gastroenterology,2003,38(1):45-51.
9Ching-Chiang Lin, Jee-Fu Huang, Li-Yu Tsai. Selenium, iron, copper, and zinc levels and copper-to-zinc ratios in serum of patients at different stages of viral hepatic diseases [J]. Biological Trace Element Research, 2006, 19 (1):15-23.
