VERNAZZA, P. H1N1 pandemic: Watch out for the first wave in Switzerland. Swiss Medical Weekly, [S. l.], v. 139, n. 5152, p. 730–730, 2009. DOI: 10.4414/smw.2009.12958. Disponível em: https://smw.ch/index.php/smw/article/view/1055. Acesso em: 16 jul. 2024.