«http://www.portaldasaude.pt/portal/conteudos/enciclopedia+da+saude/ http://www.nhsdirect.nhs.uk/languages/leaflets.aspx?language=pt» (2008) Revista Portuguesa de Medicina Geral e Familiar, 24(1), p. 112. doi:10.32385/rpmgf.v24i1.10474.