1. Department of Radiology, West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, China

2. Outpatient Office, West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, China

3. Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Nanchong City, Sichuan Province, China