Fig. 1: Scatter diagrams showing the plasma levels of zinc, copper, and zinc/copper.

A Plasma zinc levels were significantly decreased in the DN group compared to those in the control group (*P < 0.05). B Plasma copper levels were significantly increased in the DN group compared to those in the control group (*P < 0.05). C The ratio of zinc and copper was significantly decreased in the DN group compared to that in the control group (*P < 0.05).