Health (2) Salud (2) Ensaladas (2) Estudio (2) Labor (1) Inner cities (1) Listeria (1) Minors (1) Certification (1) Women (1) Witnesses (1) Unemployment (1) Teleology (1) Social classes (1) Slums (1) School lunchrooms, cafeterias, etc (1) School children--Food (1) Sampling (1) Quality of products (1) Public health (1) Poverty (1) Population (1) Popes (1) Poor (1) Obesity (1) Microorganisms (1) Legumes as food (1) Income (1) Hygiene (1) Health facilities (1)