Assiut University, Intensive Care and Pain Department, Assiut, Egypt. Electronic address: ghadafadl@aun.edu.eg. Assiut University, Faculty of Medicine, Intensive Care and Pain Department, Assiut, Egypt. Assiut University, Intensive Care and Pain Department, Assiut, Egypt. Assiut University, Faculty of Medicine, Clinical Pathology Department, Assiut, Egypt. Assiut University, Faculty of Medicine, Obstetrics & Gynecology Department, Assiut, Egypt.