1. Ahmed Mohamed Abdelhakim is in the Medical Research Group of Egypt, Cairo, Egypt and Kasr-Alainy, Faculty of Medicine, Cairo University, Cairo, Egypt. Shrouk M. Elghazaly is in the Medical Research Group of Egypt, Cairo, Egypt and Faculty of Medicine, Assiut University, Assiut, Egypt. Ahmed Lotfy is in the Department of Anesthesia and Critical Care, Cairo University Hospital, Cairo, Egypt.