1. Department of Surgical Oncology, National Cancer Institute, Cairo University, Cairo, Egypt.
2. Department of Microbiology and Immunology, Faculty of Pharmacy, Modern University for Technology and Information, Cairo, Egypt.
3. Department of Anesthesia and Intensive Care, Ain Shams University, Cairo, Egypt.
4. Department of Anesthesia, Faculty of Medicine, Cairo University, Cairo, Egypt.
5. Department of Clinical Pathology, Faculty of Medicine, Cairo University, Cairo, Egypt.