1. Department of Preventive Medicine, Shantou University Medical College, Shantou, China
2. Department of Healthcare, Guangdong Women and Children Hospital, Guangzhou, China
3. Department of Medical Quality Management, Nanfang Hospital, Guangzhou, China
4. Department of Radiation Oncology, Cancer Hospital of Shantou University Medical College, Shantou, China
5. Guangdong Provincial Key Laboratory of Infectious Diseases and Molecular Immunopathology, Shantou, China