1 Department of Microbiology and Immunology, Hollings Cancer Center, Charleston, SC 29425, USA.
2 Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC 29425, USA.
3 Department of Urology, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA.
4 Department of Microbiology and Immunology, Hollings Cancer Center, Charleston, SC 29425, USA; First Affiliated Hospital, Zhengzhou University School of Medicine, Zhengzhou, China. Electronic address: zihai@musc.edu.