1. School of Nursing, Jilin University, Changchun, Jilin province, China
2. Equal contributors
3. Intensive Care Unit, The First Hospital of Jilin University, Changchun, China
4. Orthopedics Department, China-Japan Union Hospital of Jilin University, Changchun, China
5. Department of natural sciences and Nursing, University of Houston-Downtown, Houston, TX, USA
6. School of Nursing, Jilin University, Changchun, China
7. School of Nursing, Johns Hopkins University, Baltimore, MD, USA