[1] Brigham & Womens Hosp, Div Rheumatol Immunol & Allergy, 75 Francis St, Boston, MA 02115 USA
[2] Harvard Med Sch, Boston, MA USA
[3] Brigham & Womens Hosp, 75 Francis St, Boston, MA 02115 USA
[4] Brigham & Womens Hosp, Rheumatol Immunol & Allergy, 75 Francis St, Boston, MA 02115 USA
[5] Brigham & Womens Hosp, Dept Rheumatol Allergy & Immunol, 75 Francis St, Boston, MA 02115 USA
[6] Mt Sinai Hosp, Toronto, ON, Canada