1. Department of Orthopaedics, The Second Xiangya Hospital of Central South University, Changsha 410011, P.R.China
2. Department of Endocrinology, The Fifth Central Hospital of Tianjin, Tianjin 300192, P.R.China
3. Department of Hemotology, The Second Xiangya Hospital of Central South University, Changsha 410011, P.R.China