1. Specialist of Anesthesia, El-Monira General Hospital, Ministry of Health, Egypt
2. Department of Anesthesia and Intensive Care, Faculty of Medicine, Cairo University, Giza, Egypt
3. Department of Cardiothoracic Anesthesia and Intensive Care, Essex Cardiothoracic center,MSE Foundation Trust, Giza, Egypt
4. Lecturer Department of Anesthesia and Intensive Care, Faculty of Medicine - Cairo University, Giza, Egypt