Do family doctors of the Lisbon and Tagus Valley, Alentejo and Algarve health regions get immunized against seasonal flu? Why or why not?. Portuguese Journal of Family Medicine and General Practice, [S. l.], v. 26, n. 2, p. 140–8, 2010. DOI: 10.32385/rpmgf.v26i2.10726. Disponível em: https://rpmgf.pt/ojs/index.php/rpmgf/article/view/10726. Acesso em: 18 apr. 2026.