1. Department of Infectious Diseases, Fuyang People's Hospital, Fuyang, Anhui 236000, P.R. China
2. Department of Imaging Center, Sunshine Union Hospital, Weifang, Shandong 261000, P.R. China
3. Department of Pathology, Fangzi People's Hospital, Weifang, Shandong 261200, P.R. China
4. Department of Pathology, Sunshine Union Hospital, Weifang, Shandong 261000, P.R. China