1. Department of Emergency, Weifang Hospital of Traditional Chinese Medicine, Weifang, Shandong 261041, P.R. China
2. Department of Hospital Office, Weifang People's Hospital, Weifang, Shandong 261041, P.R. China
3. Department of Thyroid and Breast Surgery, Weifang People's Hospital, Weifang, Shandong 261041, P.R. China