1. Department of Radiotherapy Oncology, The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116027, P.R.�China
2. Department of Radiotherapy Oncology, The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116027, P.R. China
3. Department of Cardiology, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
4. Department of Ophthalmology, The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116027, P.R. China
5. Department of Radiotherapy Oncology, The General Hospital of Shenyang Military Command, Shenyang, Liaoning 110016, P.R. China
6. Department of Radiotherapy Oncology, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R.�China