1 Division of Rheumatology, Allergy, & Immunology, Massachusetts General Hospital, Boston, Mass. Electronic address: amyrslevin@gmail.com.
2 Division of Rheumatology, Allergy, & Immunology, Massachusetts General Hospital, Boston, Mass.
3 Division of Rheumatology, Allergy, & Immunology, Massachusetts General Hospital, Boston, Mass; Department of Emergency Medicine, Massachusetts General Hospital, Boston, Mass.