Hunan University of Chinese Medicine Changsha 410208 Hunan China;
Hunan University of Chinese Medicine Changsha 410208 Hunan China;
First Affiliated Hospital of Hunan University of Chinese Medicine Changsha 410007 Hunan China;
Shaoyang Zhengda Orthopedic Hospital Shaoyang 422900 Hunan China;
Pulsed radiofrequency; Osteoarthritis; Knee; Meta-analysis;