1. Nursing Department, The Third Xiangya Hospital Central South University Changsha, Hunan China
2. Xiangya Nursing School Central South University 172 Tongzipo Road Changsha 410013 China
3. Cardiology Department, The Third Xiangya Hospital Central South University 138 Tongzipo Road Changsha 410013 China
4. Emergency Department, The Third Xiangya Hospital Central South University 138 Tongzipo Road Changsha 410013 China