Skin diseases in the Da Qing Diabetes Study: a cross-sectional study oleh Chang-Bing Shen, Xin Qian, Rui-Xing Yu, Xue-Lei Ji, Yin-Juan Shi, Jing Gao, Cheng-Xu Li, Ke-Ke Li, Wen-Min Fei, Xue Shen, Zi-Yi Wang, Yang Han, Xiao-Li Ning, Randy Ko, Yi-Hsiang Hsu, Xian-Yong Yin, Guang-Wei Li, Yong Cui, Li-Shao Guo