1. Department of Orthopedics, Lianyungang Affiliated Hospital of Nanjing University of Chinese Medicine, Lianyungang Traditional Chinese Medicine Hospital, Lianyungang, Jiangsu 222004, P.R. China
2. Department of Orthopedics, The First Affiliated Hospital of Kangda College of Nanjing Medical University, Xuzhou Medical University Affiliated Hospital of Lianyungang, Lianyungang, Jiangsu 222004, P.R. China