1. Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital, Boston, MA, USA
2. Harvard Medical School, Boston, MA, USA
3. Division of General Internal Medicine and Primary Care, Department of Medicine, Brigham and Women’s Hospital, Boston, MA, USA
4. Clinical Epidemiology Program, The Mongan Institute, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA
5. Department of Emergency Medicine, Massachusetts General Hospital, Boston, MA, USA