Canova L, Birchmeier M, D’Acremont V, Karly M, Landry P, Genton B. Prevalence rate and reasons for refusals of influenza vaccine in elderly. Swiss Med Wkly [Internet]. 2003 Nov. 1 [cited 2024 May 1];133(4344):598-602. Available from: https://smw.ch/index.php/smw/article/view/319