1. Department of Medical Ultrasound, Department of Gastrointestinal Surgery, National Center for International Research of Bio-targeting Theranostics, Guangxi Medical University Cancer Hospital, Guangxi Medical University. No. 71 Hedi Road, Nanning 530021, Guangxi, P.R. China
2. Central Laboratory, Department of Medical Ultrasound, and Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Tongji University. No. 301 Yanchangzhong Road, Shanghai 200072, P.R. China