Health (7) santé (6) Health (6) cohorte (6) Methods (4) Interviews (4) Manufacturers' agents (4) Interviews (4) Commission merchants (4) Older people (4) Interviews (4) Methods (4) mortalité (3) âge (3) jeune (3) Mortality (3) Children (3) Ci (Chinese poetry) (3) Mortality (3) Millennium (Eschatology) (3) Ethnicity (3) Ethnic groups (3) Confidence (3) Children (3) Black (3) Age (3) Age (3) noir (3) enquête (2) tabagisme (2)