1. School of Nursing, Wuhan University, Wuhan 430071, China
2. The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
3. Zhongnan Hospital of Wuhan University, Wuhan 430071, China
4. Project HOPE, Washington, DC 20036, USA
5. Renmin Hospital of Wuhan University, Wuhan 430060, China