Canova, L, M Birchmeier, V D’Acremont, M Karly, P Landry, and B Genton. “Prevalence Rate and Reasons for Refusals of Influenza Vaccine in Elderly”. Swiss Medical Weekly 133, no. 4344 (November 1, 2003): 598–602. Accessed May 1, 2024. https://smw.ch/index.php/smw/article/view/319.