1. Department of Surgery, American University of Beirut Medical Center, Riad El-Solh, 1107 2020 Beirut, Lebanon
2. Department of Anaesthesiology, American University of Beirut Medical Center, Riad El-Solh, 1107 2020 Beirut, Lebanon
3. Department of Anaesthesiology, Rafic Hariri University Hospital, Bir-Hasan, Beirut, Lebanon
4. Department of Anaesthesiology Duke Health, 5673 HAFS, Durham, North Carolina, USA
5. Department of Anaesthesiology Lebanese University, Rafic Hariri University Campus, Hadath, Lebanon