The european network for smoking prevention. Revista Portuguesa de Medicina Geral e Familiar, [S. l.], v. 19, n. 6, p. 642, 2003. DOI: 10.32385/rpmgf.v19i6.10002. Disponível em: https://rpmgf.pt/ojs/index.php/rpmgf/article/view/10002. Acesso em: 6 mar. 2025.