1. Department of Neurosurgery, Yantai Harbour Hospital, Yantai 264000, Shandong, China
2. Department of Molecular Imaging, Affiliated Qingdao Central Hospital, Qingdao University, Qingdao 266042, Shandong, China
3. Department of Radiology, Affiliated Qingdao Central Hospital, Qingdao University, Qingdao 266042, Shandong, China
4. ECG Room, Qingdao Women and Children’s Hospital, Qingdao 266000, Shandong, China