1 Department of Medicine (Hsieh), Gordon and Leslie Diamond Health Centre, University of British Columbia, Vancouver, BC; Allergy and Clinical Immunology (Lee), University of Toronto, Toronto, Ont. hsieh.jane@gmail.com.
2 Department of Medicine (Hsieh), Gordon and Leslie Diamond Health Centre, University of British Columbia, Vancouver, BC; Allergy and Clinical Immunology (Lee), University of Toronto, Toronto, Ont.