1. The Shraga Segal Department of Microbiology and Immunology, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
2. Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
3. Institute of Pathology, Soroka University Medical Center, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
4. Department of Obstetrics and Gynecology, Ben-Gurion University of the Negev, Beer-Sheva, Israel.