Canada's response to pandemic H1N1 influenza: the collection of individual-level data at the point of vaccination

Kwong JC, Foisy J, Quan S, Heidebrecht C, Kolbe F, Bettinger JA, Buckeridge DL, Chambers LW, Crowcroft NS, Dhalla IA, Sikora CA, Willison DJ, Pereira JA; Pubic Health Agency of Canada/Canadian Institutes of Health Research Influenza Research Network (PCIRN). Healthc Q. 2010;13(2):18-20.