1. Nursing Department Lanzhou University Second Hospital Lanzhou China
2. School of Nursing Gansu University of Chinese Medicine Lanzhou China
3. Geriatrics Department Gansu Provincial Hospital Lanzhou China
4. Nursing Department Gansu Provincial Hospital Lanzhou China
5. Clinical Educational Department Gansu Provincial Hospital Lanzhou China
6. Physical Examination Center The First People’s Hospital of Lanzhou City Lanzhou China