Research
Trends in medical and nonmedical immunization exemptions to measles-containing vaccine in Ontario: an annual cross-sectional assessment of students from school years 2002/03 to 2012/13
Sarah E. Wilson, Chi Yon Seo, Gillian H. Lim, Jill Fediurek, Natasha S. Crowcroft and Shelley L. Deeks
September 16, 2015 3 (3) E317-E323; DOI: https://doi.org/10.9778/cmajo.20140088