Perceptions of frontline staff regarding data collection methodologies used during the 2009 A H1N1 influenza immunization campaign in Canada

Julie Foisy, Susan Quach, Christine L. Heidebrecht, Jennifer A. Pereira, Sherman D. Quan, Maryse Guay, Julie A. Bettinger, Shelley L. Deeks, Stephanie Brien and Jeffrey C. Kwong