1 Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital, Boston, MA, USA; Harvard Medical School, Boston, MA, USA.
2 Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital, Boston, MA, USA; Harvard Medical School, Boston, MA, USA; Rheumatology and Allergy Clinical Epidemiology Research Center, Mongan Institute, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA. Electronic address: njpatel@mgh.harvard.edu.