1. College of Medicine, Imam Mohammad Ibn Saud Islamic University, Riyadh 11432, Saudi Arabia
2. Department of Surgery, College of Medicine, King Saud University, Riyadh 11451, Saudi Arabia
3. Critical Care Department, King Abdullah bin Abdulaziz University Hospital, Princess Nourah bint Abdulrahman University, Riyadh 11451, Saudi Arabia
4. College of Medicine, AlFaisal University, Riyadh 11533, Saudi Arabia