1. Medical Research Center, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, Shandong, China
2. Department of Pediatrics, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, China
3. The Research Center for Advanced Science and Technology, Isotope Science Center, The University of Tokyo, Meguro-ku, Tokyo, Japan
4. Department of Respiratory Medicine, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, Shandong, China
5. Department of Radiation Oncology, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, Shandong, China
6. Department of Biology, Trent University, Peterborough, Ontario, Canada