1. aDepartment of Medical Oncology, Affiliated Shantou Hospital of Sun Yat-sen University, Shantou, Guangdong, China
2. bDepartment of Good Clinical Practice, Cancer Hospital of Shantou University Medical College, Shantou, Guangdong, China
3. cCancer Research Lab, Cancer Hospital of Shantou University Medical College, Shantou, Guangdong, China
4. dDepartment of Medical Oncology, First affiliated Hospital of Shantou University Medical College, Shantou, Guangdong, China