1. Department of Medicine B', Research Unit of Autoimmune Diseases, Sheba Medical Center, Tel Hashomer (Affiliated with the Sackler Faculty of Medicine, Tel Aviv University, Ramat Aviv), Israel
2. School of Medicine, New Orleans, Louisiana State University Medical Center, Dept. of Medicine/Rheumatology, New Orleans, Louisiana, USA
3. Department of Medicine II, Hokkaido University School of Medicine, Sapporo, Japan