1. Nursing College, Shanxi Medical University, Taiyuan 030001, China
2. Department of Nursing, First Hospital of Shanxi Medical University, Taiyuan 030001, China
3. Department of Nursing, Changzhi Medical College, Changzhi 046000, China
4. Nursing Department, Shanxi Bethune Hospital, Taiyuan 030032, China
5. Drug Clinical Trial Organization, Heping Hospital of Changzhi Medical College, Changzhi 046000, China
6. Department of Public Health, Shanxi Medical University, Taiyuan 030001, China