1. The September epidemic of asthma exacerbations in children: A search for etiology 
Neil W. Johnston, MSc, Sebastian L. Johnston, MD, PhD, Joanne M. Duncan, BSc, Justina M. Greene, Tatiana Kebadze, MD, Paul K. Keith, MD, Madan Roy, MD, Susan Waserman, MD, Malcolm R. Sears, MB, ChB 
Journal of Allergy and Clinical Immunology 
Volume 115, Issue 1, Pages (January 2005)
DOI: /j.jaci
Copyright © 2005 American Academy of Allergy, Asthma and Immunology Terms and Conditions

2. Fig 1
Number of hospitalizations of children age 5 to 15 years by week of the year in Ontario from 1990 to 2000.
Journal of Allergy and Clinical Immunology  , DOI: ( /j.jaci )
Copyright © 2005 American Academy of Allergy, Asthma and Immunology Terms and Conditions

3. Fig 2
Emergency department visits in Ontario, April 2000 to March 2001 (study period, weeks 37-39, highlighted).
Journal of Allergy and Clinical Immunology  , DOI: ( /j.jaci )
Copyright © 2005 American Academy of Allergy, Asthma and Immunology Terms and Conditions

4. Fig 3
Number of prescriptions for children age 2 to 15 years for inhaled corticosteroids reimbursed by 1 major insurer in Ontario from January 1998 to October 2000.
Journal of Allergy and Clinical Immunology  , DOI: ( /j.jaci )
Copyright © 2005 American Academy of Allergy, Asthma and Immunology Terms and Conditions