1. Department of Pathology, Suining Central Hospital, Suining, Sichuan 629000, P.R. China
2. Department of Ultrasound, Suining Central Hospital, Suining, Sichuan 629000, P.R. China
3. Department of Radiology and Imaging, Suining Central Hospital, Suining, Sichuan 629000, P.R. China