Health (5) Salud (5) Attention (4) Atención (4) Labor (3) Trabajo (3) Demography (2) Aging (2) Older people (2) Envejecimiento (2) Demografía (2) Ancianos (2) Zoque language (1) Youth (1) Sociology (1) Social history (1) Responsibility (1) Quality of products (1) Population (1) Poisoning (1) Physicians (1) Physical anthropology (1) Pesticides (1) Parent and child (1) Paper (1) Old age (1) Occupations (1) Measurement (1) Matter (1) Indexes (1)