1. Radiology Department, Shanghai People's Ninth Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
2. Radiology Department, Mount Sinai School of Medicine, New York, USA
3. Department of Urology, Shanghai First People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
4. Departments of Head and Neck Surgery, University of Texas, M.D. Anderson Cancer Center, Houston, TX, USA