1. Division of Rheumatology, Immunology, and Allergy, Department of Medicine, Brigham and Women’s Hospital, Boston, MA 02115, USA.
2. Harvard Medical School, Boston, MA 02115, USA.
3. Department of Chemistry, Boston College, Chestnut Hill, MA 02467, USA.
4. Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA 01605, USA.
5. Department of Medicine, University of Wisconsin-Madison, Madison, WI 53705, USA.
6. Department of Medicine, University of Wisconsin-Madison and William S. Middleton Memorial Veterans Hospital, Madison, WI 53705, USA.