1. Department of Dermatology, The Second Affiliated Hospital of Guangzhou University of Chinese MedicineGuangdong Provincial Hospital of Chinese MedicineGuangzhou510120P. R. China
2. Department of Endoscopy, Sun Yat‐sen University Cancer Center, State Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineGuangzhou510060P. R. China
3. Department of Ultrasound, Sun Yat‐sen University Cancer Center, State Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineGuangzhou510060P. R. China