Beijing Institute of Radiation Medicine, Beijing, China.|Beijing Institute of Radiation Medicine, Beijing, China.|Beijing Institute of Radiation Medicine, Beijing, China.|Beijing Institute of Radiation Medicine, Beijing, China.|Beijing Institute of Radiation Medicine, Beijing, China.|Beijing Institute of Radiation Medicine, Beijing, China.|Beijing Institute of Radiation Medicine, Beijing, China.|Beijing Institute of Radiation Medicine, Beijing, China.|Beijing Institute of Radiation Medicine, Beijing, China.|Beijing Institute of Radiation Medicine, Beijing, China.|Beijing Institute of Radiation Medicine, Beijing, China.