1. Department of Nursing, Henan Medical College, Zhengzhou, Henan, China;
2. Department of Spine, Zhengzhou Orthopedic Hospital, Zhengzhou, Henan, China;
3. College of Nursing, Henan Technical Institute, Zhengzhou, Henan, China;
4. Department of Nephrology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China;
5. Department of Geriatric Disease, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China;
6. Medical College, Xi’an International University, Xi’an, Shaanxi, China