1. Department of Poisoning and Occupational Diseases, Shandong University, Emergency, Qilu Hospital of Shandong University, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
2. School of Public Health, Cheeloo College of Medicine, Shandong University, Shandong University, Jinan, Shandong, China
3. School of Nursing, Cheeloo College of Medicine, Shandong University, Shandong, China
4. Department of Geriatric Medicine, Qilu Hospital of Shandong University, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China