1. Department of Emergency, Yidu Central Hospital of Weifang, Weifang, Shandong 262500, P.R. China
2. Department of Ophthalmology, Yidu Central Hospital of Weifang, Weifang, Shandong 262500, P.R. China
3. Department of Cardiology, Dongying Hospital of Traditional Chinese Medicine, Dongying, Shandong 257000, P.R. China