Prevalence rate and reasons for refusals of influenza vaccine in elderly. Swiss Medical Weekly, [S. l.], v. 133, n. 4344, p. 598–602, 2003. DOI: 10.4414/smw.2003.10395. Disponível em: https://smw.ch/index.php/smw/article/view/319. Acesso em: 4 nov. 2025.