1. Department of Geriatrics, Affiliated Hospital of Hebei University of Engineering, Handan 056000, Hebei Province, China
2. Department of Nursing, Affiliated Hospital of Hebei University of Engineering, Handan 056000, Hebei Province, China
3. Department of Scientific Research and Education, Affiliated Hospital of Hebei University of Engineering, Handan 056000, Hebei Province, China
4. Department of Stomatology, Affiliated Hospital of Hebei University of Engineering, Handan 056000, Hebei Province, China
5. Department of Dynamic electrocardiogram, Affiliated Hospital of Hebei University of Engineering, Handan 056000, Hebei Province, China
6. Department of Breast, The Affiliated Hospital of Hebei University of Engineering, Handan 056000, Hebei Province, China