1. Department of Medicine, Critical Care Division, King Khalid University, Abha, Kingdome of Saudi Arabia
2. Department of Medicine, King Khalid University, Abha, Kingdome of Saudi Arabia
3. Department of Internal Medicine, Tanta College of Medicine, University of Tanta, Tanta, Egypt
4. Consultant ICU, Khamis Mushait General Hospital, Khamis Mushait, Kingdome of Saudi Arabia
5. Family and Community Medicine Department, Aseer Central Hospital, Abha, Kingdome of Saudi Arabia