1. Department of Radiation Oncology, Shanghai Proton and Heavy Ion Center, Fudan University Cancer Hospital, Shanghai, China
2. Shanghai Key Laboratory of Radiation Oncology (20dz2261000), Shanghai, China
3. Shanghai Engineering Research Center of Proton and Heavy Ion Radiation Therapy, Shanghai, China
4. Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai, China
5. Department of Oncology, Shanghai Medical College, Shanghai, China