LUTHI, J.-C.; MÉAN, F.; AMMON, C. Evaluation of a population-based prevention program against influenza among Swiss elderly people. Swiss Medical Weekly, [S. l.], v. 132, n. 4142, p. 592–592, 2002. DOI: 10.4414/smw.2002.10087. Disponível em: https://smw.ch/index.php/smw/article/view/221. Acesso em: 15 jul. 2024.