1. Orthopaedic Spinal Ward, Shanxi Provincial People’s Hospital, Taiyuan, P.R. China
2. School of Nursing, Shanxi Medical University, Taiyuan, P.R. China
3. School of Nursing, Shanxi University of Traditional Chinese Medicine, Jinzhong, P.R. China
4. Department of Nursing, Shanxi Provincial People’s Hospital, Taiyuan, P.R.China