1. Department of Vascular Surgery, Yantai Yuhuangding Hospital, Yantai, Shandong 264000, P.R. China
2. Department of Pharmacy, Yantaishan Hospital, Yantai, Shandong 264000, P.R. China
3. Department of Laboratory Medicine, People's Hospital of Rizhao, Rizhao, Shandong�276800, P.R. China
4. Department of Internal Medicine, People's Hospital of Zhangqiu, Jinan, Shandong 250200, P.R. China
5. Department of Cardiology, People's Hospital of Zhangqiu, Jinan, Shandong 250200, P.R. China
6. Department of Blood Transfusion, Weifang People's Hospital, Weifang, Shandong 261041, P.R. China