1. Department of Urology, The Affiliated Hospital of Weifang Medical University, Weifang Medical University, Weifang, Shandong, China
2. Department of Gastrointestinal and Anal Diseases Surgery, The Affiliated Hospital of Weifang Medical University, Weifang Medical University, Weifang, Shandong, China
3. School of Medical Laboratory, Weifang Medical University, Weifang, Shandong, China
4. Pathology Department, The Affiliated Hospital of Weifang Medical University, Weifang Medical University, Weifang, Shandong, China