1. From the Division of Thoracic Surgery, King Khalid University Hospital, Riyadh
2. From the Division of General Surgery, King Khalid University Hospital, Riyadh
3. From the Department of ENT, King Abdulaziz Hospital, Riyadh
4. From the Division of the Anesthesia, King Khalid University Hospital, Riyadh
5. From the Department of Radiology, King Khalid University Hospital, Riyadh