Affiliation: | 1. Shandong University School of Medicine, Jinan, Shandong, China;2. Department of Cardiology, Weihai Central Hospital, Weihai, Shandong, China;3. Department of Geratology, Yantai Yuhuangding Hospital, Yantai, Shandong, China;4. Emergency Department, Weihai Central Hospital, Weihai, Shandong, China;5. Department of Cardiology, Yantai Yuhuangding Hospital, Yantai, Shandong, China |