1. Azrieli Faculty of Medicine, Bar-Ilan University, Safed, Israel
2. Research Institute, Galilee Medical Center, Nahariya, Israel
3. Division of Rheumatology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
4. Division of Rheumatology and Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY, USA