1. Department of Health Management, Weifang People’s Hospital, Weifang 261041, China
2. Hospital Infection-Control Department, Zhangqiu District People’s Hospital, Jinan 250200, China
3. Department of Geriatrics (II), Qingdao Mental Health Center, Qingdao Seventh People’s Hospital, Qingdao 266034, China
4. Medical Record Management Section, Weifang People’s Hospital, Weifang 261041, China