1. Microbial Biotechnology Department, National Research Centre, Dokki, Egypt
2. Division of Oral Biology, Department of Periodontology, Tufts University School of Medicine, Boston, MA, USA
3. Central Lab, Theodor Bilharz Research Institute (TBRI), Ministry of Scientific Research, Giza, Egypt
4. Tropical Medicine Department, National Hepatology and Tropical Medicine Research Institute, Cairo, Egypt
5. Department of Endemic Medicine and Hepatogastroenterology, Faculty of Medicine, Cairo University, Cairo, Egypt