OECD health data 2004 [Risorsa elettronica] : a comparative analysis of 30 countries = Eco-santé OCDE 2004 : analyse comparative de 30 pays = OECD Gesundheitsdaten 2004 : vergleichende analyse von 30 ländern = Eco-salud OCDE 2004 : análisis comparativo de 30 países