Affiliation: | 1. Class 12, Grade 2015, Faculty of Clinical Medicine, Jilin University, Changchun, Jilin, China;2. Department of Library, The People's Hospital of Rizhao City, Rizhao, Shandong, China;3. Department of Oncology, The People's Hospital of Rizhao City, Rizhao, Shandong, China;4. Department of Respiratory Medicine, The People's Hospital of Rizhao City, Rizhao, Shandong, China |