1. Department of Endocrinology and Metabolism, The First People’s Hospital of Changde City, Renmin Middle Road 818, Changde, Hunan 415000, P. R. China
2. Department of Ophthalmology, The First People’s Hospital of Changde City, Renmin Middle Road 818, Changde, Hunan 415000, P. R. China
3. School of Pharmacy, Shanghai Jiao Tong University, Dongchuan Road 800, Shanghai 200000, P. R. China