enquête (3) Mexique (3) Methods (3) Methods (3) santé publique (2) distribution (2) âge (2) Children (2) Surveys (2) Surveys (2) Serum (2) Scarcity (2) Public health (2) Materials (2) Children (2) Older people (2) Age (2) Materials (2) Age (2) zinc (1) secteur des services (1) recherche (1) région (1) association (1) nutrition (1) lait (1) matériau (1) fer (1) santé (1) cuivre (1)