1. 1Division of Rheumatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI
2. 2Division of Pediatric Rheumatology, Department of Pediatrics, University of Michigan, Ann Arbor, MI
3. 3Hematology and Hemotherapy Center, Department of Pathology, University of Campinas, Campinas, Brazil
4. 4Division of Hematology & Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI