1 Department of Pathology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China.
2 Department of Pathology, The People's Hospital of Huaiyin, Jinan, China.
3 Department of Microbiology and Immunology, Tulane University, New Orleans, LA, USA.
4 Department of Pathology, Dongying City People's Hospital, Dongying, China.
5 Department of Pathology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China; Department of Pathology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China. Electronic address: yzg20062009@163.com.