1. School of Nursing, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China
2. The Central Hospital of Changsha City, Hengyang Medical School, University of South China, Changsha, Hunan 410000, China
3. Department of Cardiology, The Fourth Hospital of Changsha, Changsha, Hunan 410006, China
4. Urinary Surgery, Affiliated Nanhua Hospital, University of South China, Hengyang 421002, China
5. Nursing College, University of Xiangnan, Chenzhou, Hunan 423000, China