1. Physical Examination Center, Jilin University First Hospital, Changchun, China;
2. Urological Ward, Jilin University First Hospital, Changchun, China;
3. Cadre Ward, Jilin University First Hospital, Changchun, China;
4. Center for Cardiovascular Medicine, Jilin University First Hospital, Changchun, China;
5. Neuro-intensive Care Unit, Zhengzhou University First Affiliated Hospital, Zhengzhou, China;
6. School of Nursing, Jilin University, Changchun, China