Christian Lehmann1, Joel Sardinha2, Ahmed M Mukhtar3. 1. Department of Anesthesia, Pain Management and Perioperative Medicine, Faculty of Medicine, Dalhousie University, Halifax, Canada. chlehmann@dal.ca. 2. Department of Anesthesia, Pain Management and Perioperative Medicine, Faculty of Medicine, Dalhousie University, Halifax, Canada. 3. Department of Anesthesia, Faculty of Medicine, Surgical Intensive Care Trauma Center, Cairo University, Cairo, Egypt.