papier (1) bibliothèque (1) information (1) internet (1) sujet (1) méthode (1) index (1) survie (1) Context (1) Language (1) Complement (1) Costs (1) Databases (1) Diseases (1) Databases (1) Reference sources (1) Nineteen nineties (1) English (1) Internet (1) Gateways (1) Databases (1) Survival (1) Subject headings (1) Performance (1) Paper (1) Nature (1) Maintenance (1) Language and languages (1) Myocardial infarction (1) Diseases (1)