1. From the Division of Internal Medicine, King Abdulaziz Medical City, Riyadh, Saudi Arabia
2. Correspondence: Thari Alanazi, MD · King Abdulaziz Medical City, PO Box 22490, Riyadh 11426, Saudi Arabia · dr_thari@hotmail.com · Accepted for publication May 2009
3. From the Division of Rheumatology, Department of Medicine, King Abdulaziz Medical City, Riyadh, Saudi Arabia
4. From the Department of Radiology, King Abdulaziz Medical City, Riyadh, Saudi Arabia
5. From the Department of Pathology, King Abdulaziz Medical City, Riyadh, Saudi Arabia