1. Department of Pathology, Jinzhou Medical University, Jinzhou, Liaoning 121001, P.R. China
2. Department of Pathology, The First Hospital and College of Basic Medical Sciences of China Medical University, Shenyang, Liaoning 110001, P.R. China
3. Department of Orthopaedics, Jinzhou Second Hospital, Jinzhou, Liaoning 121000, P.R. China