1. Department of Orthopedics, Traditional Chinese Medicine Hospital of Binzhou, Binzhou, Shandong 256600, P.R. China
2. Department of Nursing, Traditional Chinese Medicine Hospital of Binzhou, Binzhou, Shandong 256600, P.R. China
3. Department of Orthopedics, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150000, P.R. China