1. Shandong Medical Imaging Research Institute, Shandong University School of Medicine, Huaiyin District, Jinan City, Shandong Province, China
2. Binzhou Medical College Hospital, Bincheng District, Binzhou City, Shandong Province, China
3. Binzhou Medical College, Guanhai Road, Laishan District, Yantai City, Shandong Province, China
4. Department of Operational Medicine, Tianjin Institute of Environmental and Operational Medicine, Heping District, Tianjin, China