Division of Rheumatology, Department of Internal Medicine, Cerrahpaşa Medical Faculty, Istanbul University-Cerrahpaşa, Istanbul, Turkey

Correspondence to Prof. Gulen Hatemi, Istanbul University-Cerrahpaşa, Cerrahpaşa Medical Faculty, Department of Internal Medicine, Division of Rheumatology, 34098 Istanbul, Turkey. Tel: +902124143000/ 21793; fax: +90 212 5890808; e-mail: [email protected]