1. School of nursing, Southern Medical University, Guangzhou, Guangdong 510515, China
2. Department of Nursing, General Hospital of Guangzhou Military Command of PLA, Guangzhou, Guangdong 510010, China
3. Department of Organ Transplantation, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China
4. Department of Nephrology, General Hospital of Guangzhou Military Command of PLA, Guangzhou, Guangdong 510010, China