1. Center of Excellence for Osteoporosis Research, King Abdulaziz University, Jeddah, Saudi Arabia.
2. Department of Radiology, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia.
3. Department of Basic Medical Sciences, College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia.
4. Department of Medicine, College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Jeddah, Saudi Arabia.
5. Department of Rheumatology, Royal London Hospital, London, United Kingdom.