1. Department of Cardiac Surgery, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, Shangdong 264000, P.R. China
2. Department of Cardiology, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, Shangdong 264000, P.R. China
3. Emergency Centre, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, Shangdong 264000, P.R. China
4. Department of Endocrinology, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, Shangdong 264000, P.R. China