1. Division of Rheumatology, Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University Irving Medical Center , New York, NY, USA
2. Rheumatology Unit, Henry Dunant Medical Center , Athens, Greece
3. Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University Irving Medical Center , New York, NY, USA