1. Department of Tuberculosis Treatment and Prevention, Shaanxi Provincial Institute for Tuberculosis Control and Prevention, Xi'an, Shaanxi 710048, P.R. China
2. Department of Orthopedics, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
3. Department II of Tuberculosis Treatment, Tuberculosis Prevention and Control Hospital of Shaanxi Provincial, Xi'an, Shaanxi 710100, P.R. China
4. Department of Tuberculosis Treatment, Shaanxi Provincial Institute for Tuberculosis Control and Prevention, Xi'an, Shaanxi 710048, P.R. China