risque (1) association (1) information (1) âge (1) adulte (1) Control (1) Cases (1) Hepatitis C virus (1) Ci (Chinese poetry) (1) Swiss (1) Social groups (1) Sex (1) Risk (1) Population (1) Persons (1) Men (1) Human beings (1) Lymphomas (1) Immunoglobulins (1) Male homosexuality (1) Hepatitis viruses (1) Hepatitis B virus (1) Hepatitis B (1) Hepatitis (1) Confidence intervals (1) Older people (1) Age (1) Cases (1) Case-control method (1) Age (1)