1. Department of Radiation Oncology, The First Hospital of Jilin University, 71 Xinmin Street, Changchun, China
2. Department of Internal Medicine, Florida Hospital, 7727 Lake Underhill Rd, Orlando, FL, USA
3. Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, 1163 Xinmin Street, Changchun, China
4. The Key Laboratory of Pathobiology, Ministry of Education, Jilin University, 126 Xinmin Street, Changchun, China