1. Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shanxi, China
2. Library of Binzhou Medical University, Yantai, Shandong, China
3. Department of Radiology, Binzhou Medical University Hospital, Binzhou, Shandong, China
4. Department of Neurosurgery, Binzhou Medical University Hospital, Binzhou, Shandong, China