1. Departments of Microbiology and Immunology, and Obstetrics and Gynecology, Rosalind Franklin University of Medicine and Science, Chicago, Illinois USA
2. Departments of Microbiology and Immunology, and Obstetrics and Gynecology, Rosalind Franklin University of Medicine and Science, Chicago, Illinois USA; Flow Cytometry Laboratory, Rosalind Franklin University of Medicine and Science, 333 Green Bay Rd., N. Chicago, IL 60064;