1. School of Nursing, Nanjing Medical University, Nanjing, China
2. School of Nursing, Nanjing Medical University, 101 Longmian Avenue, Jiangning District, Nanjing 211166, P.R. China
3. Nursing Department, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing 210029, P.R. China