title: Risk factors for acute hepatitis A in Italy: possible pitfalls of a disease registry-based case-control study.
authors.forename: S A
authors.initials: SA
authors.lastname: Nishioka
mesh_terms: D000208:Acute Disease; D016022:Case-Control Studies; D006506:Hepatitis A / Q000209:etiology*; D006801:Humans; D007558:Italy; D012042:Registries; D012307:Risk Factors