1. Department of Medical Epidemiology, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia
2. Laboratory of Transmission, Control and Immunobiology of Infections (LR11IPT02), Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia
3. Faculty of Medicine of Sousse, University of Sousse, Sousse, Tunisia
4. Laboratory of Microbiology-Biochemistry, Aziza Othmana Hospital, University of Tunis, Tunis, Tunisia
5. Laboratory of Clinical Immunology, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia