1. Nursing School, Central South University, Changsha, China
2. Nursing Department, The Third Xiangya Hospital of Central South University, Changsha, China
3. Research Center of Chinese Health Ministry on Transplantation Medicine Engineering and Technology, The Third Xiangya Hospital of Central South University, Changsha, China
4. College of Nursing and Public Health, Adelphi University, New York, NY, USA
5. Department of Neurology, The Third Xiangya Hospital of Central South University, Changsha, China