1. Orthopaedics Surgery Department, Ministry of the National Guard-Health Affairs King Abdulaziz Medical City, Riyadh, Saudi Arabia
2. King Abdullah International Medical Research Centre, Riyadh, Saudi Arabia
3. King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
4. Ministry of the National Guard-Health Affairs King Abdulaziz Medical City, Riyadh, Saudi Arabia
5. College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
6. Spine Surgery Department, King Fahad Specialist Hospital, Dammam, Saudi Arabia